Is there an advantage to hookless rims?
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Lower price
Easier tire mounting
Lighter weight
Of those I wouldn't consider weight to be a significant factor. Ease of mounting is very welcome IMO! Price sensitivity is individual, but who wants to pay more than they have to?
Slightly harder to top off sealant (won't stay on rim if deflated)
Less proven
Smaller tire selection
Though I think hookless has pretty much caught up at this point, with a good selection of reliable tires.
For topping off sealant there are valves which permit doing so without deflating.
Both hooked and hookless are rideable deflated, though the tire will almost certainly be destroyed doing so.
Easier tire mounting
Lighter weight
Of those I wouldn't consider weight to be a significant factor. Ease of mounting is very welcome IMO! Price sensitivity is individual, but who wants to pay more than they have to?
Slightly harder to top off sealant (won't stay on rim if deflated)
Less proven
Smaller tire selection
Though I think hookless has pretty much caught up at this point, with a good selection of reliable tires.
For topping off sealant there are valves which permit doing so without deflating.
Both hooked and hookless are rideable deflated, though the tire will almost certainly be destroyed doing so.
My hookless rims are easier to mount tires on, but I'm not sure that has anything to do with the lack of a rim hook. I think it's probably more due to the manufacturing tolerance being a lot better, and the fact that I'm not trying to pry-bar on GP5000 TL's, which are really the only tubeless tires that have ever given me mounting problems.
Weight? I think I read once that the hook adds 15 grams vs hookless. Maybe there's more layers of CF needed to reinforce the hook though so that number goes up? I feel like the weight aspect might be a bit of marketing. My hookless wheels are 1500g for the pair, which is reasonably light for a non-weight weenie build. I've definitely seen hooked rims that are lighter, but like anything they cost way more money.
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Thank you. I know a lot of what I post seems retro grouchy or reactionary but I am honestly just scratching my head on this one. The big guys with more money than sense sometimes are hell bent on going this direction (I mean their scrap $ recovery isn't anything small. It's a huge deal) so they will eventually force it all to work but at the end of the day there is still no real benefit to the rider.
You could say that about a lot of technical iterations we have seen in the last 15 years or so but at least most of those had some pseudo benefit that we knew about at the start that we all worked to really get to and realize. This one's pseudo benefit is that "it can be done and the tires shouldn't blow off". That's not a benefit in my book. *shrug*
You could say that about a lot of technical iterations we have seen in the last 15 years or so but at least most of those had some pseudo benefit that we knew about at the start that we all worked to really get to and realize. This one's pseudo benefit is that "it can be done and the tires shouldn't blow off". That's not a benefit in my book. *shrug*
Hookless = Lighter weight rims that are easier to manufacture which means less scrap when manufacturing them which means they cost less for the consumer. People are also running wider tires at lower pressures so "blow-off" shouldn't be an issue.
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Thinking about this thread as I'm ordering oxygen sensors for a work vehicle. Which level should I get? OEM, or aftermarket? What level? Some are more than half the price of OEM. I'm guessing cheaper is always better. Maybe not. The worst that could happen is they leave me on the side of the road stranded. But then you figure in tow costs.......................
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You obviously only work on the manufacturing side and not in operations or management and sales otherwise you would know this to be categorically false. Price and cost are not directly linked. Every armchair economist and basic engineer mistakenly thinks they are. A reduction is cost doesn't always mean a reduction in price. An increase of cost is always used as justification for a price increase. The fact is that prices are set by market-not cost. There's an entire field of pricing methodologies dedicated to the concept. I have had to go through thorough explanations of this in the past on here but if you aren't clear on this concept then by all means post your next iteration and we can follow the concept completely until it starts to take hold for you. Some quick off the cuff examples - gas prices, software prices, phone prices, service prices, etc. Where cost enters the equation is on the operational metrics side of both production and sales as a means of measuring performance. Also when it becomes obvious that one's costs exceed their ability to meet market price.
Seriously this whole thing is like arguing that gravel is cool because it doesn't have rules and completely ignoring the reason that road has rules is because people have died.
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I don't even know where to start with this one. You don't know me and made a 100% incorrect assumption as a result. If you work in heavy industrial metal fab then I am sure you work with items I either helped manufacture or made parts for. Seeing as how you are in Northern Wisconsin there's a large chance I have walked through your operation.
We already covered that clearly. Just in the same way that switching from a threaded interface on a bottom bracket to a press-fit reduced cost in frame manufacturing.
You obviously only work on the manufacturing side and not in operations or management and sales otherwise you would know this to be categorically false. Price and cost are not directly linked. Every armchair economist and basic engineer mistakenly thinks they are. A reduction is cost doesn't always mean a reduction in price. An increase of cost is always used as justification for a price increase. The fact is that prices are set by market-not cost. There's an entire field of pricing methodologies dedicated to the concept. I have had to go through thorough explanations of this in the past on here but if you aren't clear on this concept then by all means post your next iteration and we can follow the concept completely until it starts to take hold for you. Some quick off the cuff examples - gas prices, software prices, phone prices, service prices, etc. Where cost enters the equation is on the operational metrics side of both production and sales as a means of measuring performance. Also when it becomes obvious that one's costs exceed their ability to meet market price.
It's a very Pollyannaish thought. First off tires are blowing off of rims. This is why companies are taking the time to test individual tires and post what they feel is safe. As for running lower pressure on wide tires - yup. A subset of enthusiasts are indeed running wider tires at lower pressures. A whole slew of enthusiasts and racers and recreational riders who have been pumping up their tires to 100-120psi for 20-30 years have a whole lifetime of habits and behaviors that won't change overnight.
Seriously this whole thing is like arguing that gravel is cool because it doesn't have rules and completely ignoring the reason that road has rules is because people have died.
We already covered that clearly. Just in the same way that switching from a threaded interface on a bottom bracket to a press-fit reduced cost in frame manufacturing.
You obviously only work on the manufacturing side and not in operations or management and sales otherwise you would know this to be categorically false. Price and cost are not directly linked. Every armchair economist and basic engineer mistakenly thinks they are. A reduction is cost doesn't always mean a reduction in price. An increase of cost is always used as justification for a price increase. The fact is that prices are set by market-not cost. There's an entire field of pricing methodologies dedicated to the concept. I have had to go through thorough explanations of this in the past on here but if you aren't clear on this concept then by all means post your next iteration and we can follow the concept completely until it starts to take hold for you. Some quick off the cuff examples - gas prices, software prices, phone prices, service prices, etc. Where cost enters the equation is on the operational metrics side of both production and sales as a means of measuring performance. Also when it becomes obvious that one's costs exceed their ability to meet market price.
It's a very Pollyannaish thought. First off tires are blowing off of rims. This is why companies are taking the time to test individual tires and post what they feel is safe. As for running lower pressure on wide tires - yup. A subset of enthusiasts are indeed running wider tires at lower pressures. A whole slew of enthusiasts and racers and recreational riders who have been pumping up their tires to 100-120psi for 20-30 years have a whole lifetime of habits and behaviors that won't change overnight.
Seriously this whole thing is like arguing that gravel is cool because it doesn't have rules and completely ignoring the reason that road has rules is because people have died.
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I don't even know where to start with this one. You don't know me and made a 100% incorrect assumption as a result. If you work in heavy industrial metal fab then I am sure you work with items I either helped manufacture or made parts for. Seeing as how you are in Northern Wisconsin there's a large chance I have walked through your operation.
We already covered that clearly. Just in the same way that switching from a threaded interface on a bottom bracket to a press-fit reduced cost in frame manufacturing.
You obviously only work on the manufacturing side and not in operations or management and sales otherwise you would know this to be categorically false. Price and cost are not directly linked. Every armchair economist and basic engineer mistakenly thinks they are. A reduction is cost doesn't always mean a reduction in price. An increase of cost is always used as justification for a price increase. The fact is that prices are set by market-not cost. There's an entire field of pricing methodologies dedicated to the concept. I have had to go through thorough explanations of this in the past on here but if you aren't clear on this concept then by all means post your next iteration and we can follow the concept completely until it starts to take hold for you. Some quick off the cuff examples - gas prices, software prices, phone prices, service prices, etc. Where cost enters the equation is on the operational metrics side of both production and sales as a means of measuring performance. Also when it becomes obvious that one's costs exceed their ability to meet market price.
It's a very Pollyannaish thought. First off tires are blowing off of rims. This is why companies are taking the time to test individual tires and post what they feel is safe. As for running lower pressure on wide tires - yup. A subset of enthusiasts are indeed running wider tires at lower pressures. A whole slew of enthusiasts and racers and recreational riders who have been pumping up their tires to 100-120psi for 20-30 years have a whole lifetime of habits and behaviors that won't change overnight.
Seriously this whole thing is like arguing that gravel is cool because it doesn't have rules and completely ignoring the reason that road has rules is because people have died.
We already covered that clearly. Just in the same way that switching from a threaded interface on a bottom bracket to a press-fit reduced cost in frame manufacturing.
You obviously only work on the manufacturing side and not in operations or management and sales otherwise you would know this to be categorically false. Price and cost are not directly linked. Every armchair economist and basic engineer mistakenly thinks they are. A reduction is cost doesn't always mean a reduction in price. An increase of cost is always used as justification for a price increase. The fact is that prices are set by market-not cost. There's an entire field of pricing methodologies dedicated to the concept. I have had to go through thorough explanations of this in the past on here but if you aren't clear on this concept then by all means post your next iteration and we can follow the concept completely until it starts to take hold for you. Some quick off the cuff examples - gas prices, software prices, phone prices, service prices, etc. Where cost enters the equation is on the operational metrics side of both production and sales as a means of measuring performance. Also when it becomes obvious that one's costs exceed their ability to meet market price.
It's a very Pollyannaish thought. First off tires are blowing off of rims. This is why companies are taking the time to test individual tires and post what they feel is safe. As for running lower pressure on wide tires - yup. A subset of enthusiasts are indeed running wider tires at lower pressures. A whole slew of enthusiasts and racers and recreational riders who have been pumping up their tires to 100-120psi for 20-30 years have a whole lifetime of habits and behaviors that won't change overnight.
Seriously this whole thing is like arguing that gravel is cool because it doesn't have rules and completely ignoring the reason that road has rules is because people have died.
Not only have other people in this thread mentioned that they can buy hookless rims cheaper than what similar hooked rims cost in the past, it's talked about many other places.
"From our development of hookless rims, we saw clear weight savings (about 10-15g lighter per rim) for the same profile and dimensions, when compared to hooked. There's also a cost reduction owing to a simpler manufacturing process, which we passed on to the rider. We provided clear guidance that they were to be used with certain tires and at certain pre-tested pressures."
https://us.huntbikewheels.com/blogs/...d-an-explainer
"Lower manufacturing costs can be passed to the customer"
https://road.cc/content/feature/hook...ter-you-285715
Hookless rim construction is cheaper and less complicated, actually allows the wheels less expensive while also being stronger and better.
https://bikerumor.com/best-road-tubeless-wheels/
"Another reason is cost. Hookless rim are cheaper to manufacture. There is less material involved and less labor so the cost goes down."
https://blog.flocycling.com/carbon-w...hookless-rims/
Again...It's not as scary as you make it out to be.
https://bikerumor.com/insider-interv...or-road-bikes/
#108
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I work as an engineer for a company that manufactures a product and work with a lot of aluminum extruders. I have a pretty good handle on how all of this works. And no, you haven't been at my facility.
Not only have other people in this thread mentioned that they can buy hookless rims cheaper than what similar hooked rims cost in the past, it's talked about many other places.
"From our development of hookless rims, we saw clear weight savings (about 10-15g lighter per rim) for the same profile and dimensions, when compared to hooked. There's also a cost reduction owing to a simpler manufacturing process, which we passed on to the rider. We provided clear guidance that they were to be used with certain tires and at certain pre-tested pressures."
https://us.huntbikewheels.com/blogs/...d-an-explainer
"Lower manufacturing costs can be passed to the customer"
https://road.cc/content/feature/hook...ter-you-285715
Hookless rim construction is cheaper and less complicated, actually allows the wheels less expensive while also being stronger and better.
https://bikerumor.com/best-road-tubeless-wheels/
"Another reason is cost. Hookless rim are cheaper to manufacture. There is less material involved and less labor so the cost goes down."
https://blog.flocycling.com/carbon-w...hookless-rims/
Again...It's not as scary as you make it out to be.
https://bikerumor.com/insider-interv...or-road-bikes/
Not only have other people in this thread mentioned that they can buy hookless rims cheaper than what similar hooked rims cost in the past, it's talked about many other places.
"From our development of hookless rims, we saw clear weight savings (about 10-15g lighter per rim) for the same profile and dimensions, when compared to hooked. There's also a cost reduction owing to a simpler manufacturing process, which we passed on to the rider. We provided clear guidance that they were to be used with certain tires and at certain pre-tested pressures."
https://us.huntbikewheels.com/blogs/...d-an-explainer
"Lower manufacturing costs can be passed to the customer"
https://road.cc/content/feature/hook...ter-you-285715
Hookless rim construction is cheaper and less complicated, actually allows the wheels less expensive while also being stronger and better.
https://bikerumor.com/best-road-tubeless-wheels/
"Another reason is cost. Hookless rim are cheaper to manufacture. There is less material involved and less labor so the cost goes down."
https://blog.flocycling.com/carbon-w...hookless-rims/
Again...It's not as scary as you make it out to be.
https://bikerumor.com/insider-interv...or-road-bikes/
You realize that I personally know and am in the same industry as many who you have quoted, right?
Weight savings - I mentioned weight savings a ton of times. To put the quoted 10-15g into perspective one can save the more weight by swapping to alloy nipples over brass (18-20g ish) - yet we hardly ever do (even Zipp and ENVE switched back to brass) because the drawback eventually to the life of the wheel.
So again - I never said it doesn't show in in reduced wheel weight - rather that difference in weight is negligible and massively eclipsed by the myriad of other variables and choices involved in wheel building. To me once again not constituting a real benefit for the rider that outweighs the downsides of the current state of the technology.
In all of the cost quote - all of them reference it's cheaper to make them. That isn't in dispute either. The point I made is that price isn't directly linked to cost. Cost saving was never in question. it resulting in actual price reductions to customers? That's up to each company. What you've missed is that there was a ton of tech improvements in molding over the last handful of years 5-8 or so that have steadily been dropping costs in carbon wheel tech. At the same time companies like SRAM/Zipp finally started seeing massive pushback against the ever increasing price of wheels. So much so that they didn't take a single pull of their blanket for spokes during late 2018 and most of 2019 (could be off on the specific timeframe but it was pre-0pandemic and was something like 9 months of time). The market pushed the price on these down. The cost savings is just one of the pile of cost savings they have been chasing to help preserve margins at the lower prices.
...but once again the market pushed the price: not the cost savings.
All of this boils down to the same thing: there's no "real" benefit to the rider that makes jumping over to hookless something that everyone should absolutely be considering right now. I have kept searching for the real benefit. I know we are heading this way - can't stop it. I know the tech will improve - it isn't there now IMHO and I am not alone in that assertion by any means. Seriously take the time to listen to Josh Poertner - someone who is an advocate for tubeless and hookless tech in general as an iteration but even he says it's not completely there yet, not for everyone and openly discusses the number and types of blow-offs they get while testing. He readily states the benefits as being manufacturer based in nature and that will push the change.
While Josh isn't the singular repository for all cycling knowledge I would sit and listen to him discuss and make a case for anything he believes. He's an engineer's engineer. He's like the Sheldon Brown for people who have analysis paralysis.
Just like with pressfit BB's - there will be people of all walks who talk about and believe there is some sort of benefit to the tech yet over time more and more people will be left scratching their heads and forgetting what the point initially was.
The thread is literally "is there an advantage to hookless rims" - Like with everything else I'm still waiting for ones I consider worth outweighing the drawbacks.
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#109
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...
https://blog.flocycling.com/carbon-w...hookless-rims/
Again...It's not as scary as you make it out to be.
https://blog.flocycling.com/carbon-w...hookless-rims/
Again...It's not as scary as you make it out to be.
"Does FLO Have Hooked Or Hookless Rims?At FLO, we make road and gravel carbon wheels. We consider the following when designing wheels for both road and gravel cycling:
- We are committed to developing that fastest products we can make. This means tire selection is critical.
- We do not want to limit the selection tires that can be used on a FLO wheel.
- We want those using FLO wheels to have the choice if they use tubes or tubeless installations.
- We are committed to safety and do not want to develop products that increase the potential of a blow-off scenario.
- Manufacturing cost will not be a factor.
Our Recommendation
In our opinion, if you are buying mountain bike wheels, hookless is the best option. Because of this, it’s easy to think that hookless would also be a great choice for road and gravel wheels. However, as this article shows, that’s not the case. For road and gravel wheels, we highly recommend rims that have hooks so that you can buy wheels designed around fast tires, are not limited to a small list of tires, and are not risking an unnecessary blow-off.The only reason a hookless rim for road or gravel makes sense today is if you are ok with the limitations currently imposed on tire selection and pressures. In all other cases, pick a hooked rim." (The bolding is mine.)
prj71, you might want to read the links you provided. This one reinforces the doubts I had when I opened this thread.
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#110
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"Lower manufacturing costs can be passed on to the consumer."
Interesting choice of verb phrase. "Can be" is not the same as "will be" or "are being." I haven't come across any specific examples of a hookless rim being marketed as a less-expensive alternative to the equivalent hooked version. If there are some examples, I hope someone will post them here.
From the road.cc link in post 107:
Campagnolo says that they “are not neglecting its [hookless] potential in the future but, for today’s average consumer, hooked systems (that we have in use) are simply still safer and more versatile.”
By the way, all of the arguments in favor of hookless rims also apply to the decades-old example of what were then called "smooth-sided" rims. Those, too, had a pressure limit of around 70 psi. But those of us working in bike shops in the 1960s and, especially, the 1970s, when narrow-section, high-pressure tires arrived on the scene, replaced lots of tires and tubes that had been (marginally) overinflated by riders looking for better performance (whether illusory or not) from their 27" x 1 i/4" tires.
The advent of hooked beads was revelatory. All of us working in bike shops would breathe a sigh of relief when we replaced a tire or tube on a hook bead rim. One less problem to worry about.
Interesting choice of verb phrase. "Can be" is not the same as "will be" or "are being." I haven't come across any specific examples of a hookless rim being marketed as a less-expensive alternative to the equivalent hooked version. If there are some examples, I hope someone will post them here.
From the road.cc link in post 107:
Campagnolo says that they “are not neglecting its [hookless] potential in the future but, for today’s average consumer, hooked systems (that we have in use) are simply still safer and more versatile.”
By the way, all of the arguments in favor of hookless rims also apply to the decades-old example of what were then called "smooth-sided" rims. Those, too, had a pressure limit of around 70 psi. But those of us working in bike shops in the 1960s and, especially, the 1970s, when narrow-section, high-pressure tires arrived on the scene, replaced lots of tires and tubes that had been (marginally) overinflated by riders looking for better performance (whether illusory or not) from their 27" x 1 i/4" tires.
The advent of hooked beads was revelatory. All of us working in bike shops would breathe a sigh of relief when we replaced a tire or tube on a hook bead rim. One less problem to worry about.
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I have to say I'm more comfortable with hooked road rims at this point in time. I can see the obvious attraction of hookless rims to the industry, but I agree with Psimet2001 that the benefit to the customer is insignificant and potentially more hassle. At least right now.
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Also while this was going on I happened to listen to the latest marginal gains podcast and Josh even goes over how he used to not be able to watch pro racing for fear of something happening to a rider on his stuff. Before some of the resin changes I used to lose a lot of sleep thinking about delam. Hell I had a rider who I built some EDGE (now ENVE) wheels for a huge sportif "Tour of TransAlps" or some such came back to tell me he had blown the entire hook off the rim. I was shocked. He said he was so scared descending the alps that he used the brakes almost constantly the whole way down. Had all sorts of blisters on his hands to prove it. While I pointed out that no carbon clincher was built for that kind of heat buildup at the time EDGE had no issue covering it and replacing it and mentioned off hand how there had been a rash of that in the same batch those came out of.
In those early days they were learning and iterating as they went. Almost all of us were. What got me is they had no problem placing that learning and iteration effect on the rider. I had an issue with it. I still do.
Also fun point - he mentions the 2008 Zipp taco at Paris Roubaix with magnus. One of my co-hosts on my podcast now is Mike Friedman was riding as his domestique the year those wheels failed. I haven't heard any stories about it from him and if his last few comments are any indication it seems like he doesn't really "remember" all that stuff until someone points it out to him. Just an interesting thought.
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A clear endorsement ot hookless rims. And I quote from their website:
"Does FLO Have Hooked Or Hookless Rims?At FLO, we make road and gravel carbon wheels. We consider the following when designing wheels for both road and gravel cycling:
The only reason a hookless rim for road or gravel makes sense today is if you are ok with the limitations currently imposed on tire selection and pressures. In all other cases, pick a hooked rim." (The bolding is mine.)
prj71, you might want to read the links you provided. This one reinforces the doubts I had when I opened this thread.
"Does FLO Have Hooked Or Hookless Rims?At FLO, we make road and gravel carbon wheels. We consider the following when designing wheels for both road and gravel cycling:
- We are committed to developing that fastest products we can make. This means tire selection is critical.
- We do not want to limit the selection tires that can be used on a FLO wheel.
- We want those using FLO wheels to have the choice if they use tubes or tubeless installations.
- We are committed to safety and do not want to develop products that increase the potential of a blow-off scenario.
- Manufacturing cost will not be a factor.
Our Recommendation
In our opinion, if you are buying mountain bike wheels, hookless is the best option. Because of this, it’s easy to think that hookless would also be a great choice for road and gravel wheels. However, as this article shows, that’s not the case. For road and gravel wheels, we highly recommend rims that have hooks so that you can buy wheels designed around fast tires, are not limited to a small list of tires, and are not risking an unnecessary blow-off.The only reason a hookless rim for road or gravel makes sense today is if you are ok with the limitations currently imposed on tire selection and pressures. In all other cases, pick a hooked rim." (The bolding is mine.)
prj71, you might want to read the links you provided. This one reinforces the doubts I had when I opened this thread.
We don't have a rash of people blowing tires off their road bike and gravel bike wheels.
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I just hope hookless rims don't turn into a repeat of the Mavic R-Sys debacle. Mavic and their loyal customers insisted that there was no problem with those carbon-spoke wheels up until (and even after) they voluntarily withdrew the wheels from the market.
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The real danger is when this garbage gets in general circulation and eventually enters the 2nd hand market. Someone not knowing to look for a hook or even knowing "normal" rims has hooks, will mount a clincher and a tube, and have it blow off. If it haven't already happened, it will. - Considering the endless noob questions about expensive bikes and parts I see every day on FB.
Of course ppl will endlessly argue the user is a fault, however there is no safety mechanism to prevent this. They even made the rim the exact same size, making every tyre out there superficially compatible even if most TL and every clincher will create an unsafe condition.
Of course ppl will endlessly argue the user is a fault, however there is no safety mechanism to prevent this. They even made the rim the exact same size, making every tyre out there superficially compatible even if most TL and every clincher will create an unsafe condition.
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The real danger is when this garbage gets in general circulation and eventually enters the 2nd hand market. Someone not knowing to look for a hook or even knowing "normal" rims has hooks, will mount a clincher and a tube, and have it blow off. If it haven't already happened, it will. - Considering the endless noob questions about expensive bikes and parts I see every day on FB.
Of course ppl will endlessly argue the user is a fault, however there is no safety mechanism to prevent this. They even made the rim the exact same size, making every tyre out there superficially compatible even if most TL and every clincher will create an unsafe condition.
Of course ppl will endlessly argue the user is a fault, however there is no safety mechanism to prevent this. They even made the rim the exact same size, making every tyre out there superficially compatible even if most TL and every clincher will create an unsafe condition.
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The real danger is when this garbage gets in general circulation and eventually enters the 2nd hand market. Someone not knowing to look for a hook or even knowing "normal" rims has hooks, will mount a clincher and a tube, and have it blow off. If it haven't already happened, it will. - Considering the endless noob questions about expensive bikes and parts I see every day on FB.
Of course ppl will endlessly argue the user is a fault, however there is no safety mechanism to prevent this. They even made the rim the exact same size, making every tyre out there superficially compatible even if most TL and every clincher will create an unsafe condition.
Of course ppl will endlessly argue the user is a fault, however there is no safety mechanism to prevent this. They even made the rim the exact same size, making every tyre out there superficially compatible even if most TL and every clincher will create an unsafe condition.
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The real danger is when this garbage gets in general circulation and eventually enters the 2nd hand market. Someone not knowing to look for a hook or even knowing "normal" rims has hooks, will mount a clincher and a tube, and have it blow off. If it haven't already happened, it will. - Considering the endless noob questions about expensive bikes and parts I see every day on FB.
Of course ppl will endlessly argue the user is a fault, however there is no safety mechanism to prevent this. They even made the rim the exact same size, making every tyre out there superficially compatible even if most TL and every clincher will create an unsafe condition.
Of course ppl will endlessly argue the user is a fault, however there is no safety mechanism to prevent this. They even made the rim the exact same size, making every tyre out there superficially compatible even if most TL and every clincher will create an unsafe condition.
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Here's a question for Psimet2001.
This is an original steel, 27 × 1 1/4" hookless rim that originally came on a vintage mixte I refurbished for my wife. When I tried to put a better tire on it rated to 90 PSI, it would blow off at 80. So, I lowered the pressure to 70 and it stayed on. On the first ride, however it blew off. Replaced with hooked rims. My question is:
Is there a manufacturing standard now, or is one coming that the rim and tire manufacturers will have to comply to? Something similar to the helmet requirements? Whether it is a cheap rim/tire like the one pictured or premium top of the line?
Thanks in advance.
This is an original steel, 27 × 1 1/4" hookless rim that originally came on a vintage mixte I refurbished for my wife. When I tried to put a better tire on it rated to 90 PSI, it would blow off at 80. So, I lowered the pressure to 70 and it stayed on. On the first ride, however it blew off. Replaced with hooked rims. My question is:
Is there a manufacturing standard now, or is one coming that the rim and tire manufacturers will have to comply to? Something similar to the helmet requirements? Whether it is a cheap rim/tire like the one pictured or premium top of the line?
Thanks in advance.
#123
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Here's a question for Psimet2001.
This is an original steel, 27 × 1 1/4" hookless rim that originally came on a vintage mixte I refurbished for my wife. When I tried to put a better tire on it rated to 90 PSI, it would blow off at 80. So, I lowered the pressure to 70 and it stayed on. On the first ride, however it blew off. Replaced with hooked rims. My question is:
Is there a manufacturing standard now, or is one coming that the rim and tire manufacturers will have to comply to? Something similar to the helmet requirements? Whether it is a cheap rim/tire like the one pictured or premium top of the line?
Thanks in advance.
This is an original steel, 27 × 1 1/4" hookless rim that originally came on a vintage mixte I refurbished for my wife. When I tried to put a better tire on it rated to 90 PSI, it would blow off at 80. So, I lowered the pressure to 70 and it stayed on. On the first ride, however it blew off. Replaced with hooked rims. My question is:
Is there a manufacturing standard now, or is one coming that the rim and tire manufacturers will have to comply to? Something similar to the helmet requirements? Whether it is a cheap rim/tire like the one pictured or premium top of the line?
Thanks in advance.
#124
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The real danger is when this garbage gets in general circulation and eventually enters the 2nd hand market. Someone not knowing to look for a hook or even knowing "normal" rims has hooks, will mount a clincher and a tube, and have it blow off. If it haven't already happened, it will. - Considering the endless noob questions about expensive bikes and parts I see every day on FB.
Of course ppl will endlessly argue the user is a fault, however there is no safety mechanism to prevent this. They even made the rim the exact same size, making every tyre out there superficially compatible even if most TL and every clincher will create an unsafe condition.
Of course ppl will endlessly argue the user is a fault, however there is no safety mechanism to prevent this. They even made the rim the exact same size, making every tyre out there superficially compatible even if most TL and every clincher will create an unsafe condition.
We still get the "the brakes were making noise so I lubed them up" guys.
All that is fine and good as even lubed up brakes can usually kinda slow people down but tires blowing off rims because someone threw 100psi in there when they should now only be putting 50psi in there... "there will be blood" so to speak.
Seriously discussing this here is like talking about valve adjustments on a car forum. you'll get a couple camps of specific thoughts on how things should be done but the overwhelming vast majority of drivers don't even know what a valve is or if they do they sure wouldn't want to discuss adjusting it or even servicing it. To quote PCad (RIP) "I have people for that"
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PSIMET Wheels, PSIMET Racing, PSIMET Neutral Race Support, and 11 Jackson Coffee
Podcast - YouTube Channel
Video about PSIMET Wheels
Podcast - YouTube Channel
Video about PSIMET Wheels
#125
I eat carbide.
Join Date: Jan 2006
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Here's a question for Psimet2001.
This is an original steel, 27 × 1 1/4" hookless rim that originally came on a vintage mixte I refurbished for my wife. When I tried to put a better tire on it rated to 90 PSI, it would blow off at 80. So, I lowered the pressure to 70 and it stayed on. On the first ride, however it blew off. Replaced with hooked rims. My question is:
Is there a manufacturing standard now, or is one coming that the rim and tire manufacturers will have to comply to? Something similar to the helmet requirements? Whether it is a cheap rim/tire like the one pictured or premium top of the line?
Thanks in advance.
This is an original steel, 27 × 1 1/4" hookless rim that originally came on a vintage mixte I refurbished for my wife. When I tried to put a better tire on it rated to 90 PSI, it would blow off at 80. So, I lowered the pressure to 70 and it stayed on. On the first ride, however it blew off. Replaced with hooked rims. My question is:
Is there a manufacturing standard now, or is one coming that the rim and tire manufacturers will have to comply to? Something similar to the helmet requirements? Whether it is a cheap rim/tire like the one pictured or premium top of the line?
Thanks in advance.
That was a Schwinn hookless standard. It requires a specific tire with an "S" designation. Can't remember the specifics but they are readily available. Something like an S5 or S7 or some such. I always have to look it up.
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PSIMET Wheels, PSIMET Racing, PSIMET Neutral Race Support, and 11 Jackson Coffee
Podcast - YouTube Channel
Video about PSIMET Wheels
Podcast - YouTube Channel
Video about PSIMET Wheels