Max Tire Pressure Label (700 x 32)
#51
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80->70 psi, 12.5% larger contact patch.
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This whole thread is a roller coaster of misinformation and bickering. Top stuff, lads.
Here's what HED recommends for their wider rims (like OP's):
Here's what HED recommends for their wider rims (like OP's):
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#53
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Since you're so worried about misinformation, perhaps you could explain why two tires labeled 25mm but one measuring 25 mm and the other 28 mm should use the same pressure.
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Are you assuming I am somehow responsible for labeling pressure ratings on different tires, or are you just strawmanning in order to sound "correct" about something?
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#55
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I'm a) wondering why you chose to post that plot, b) warning readers that it is useless since the x-axis uses a nonsensical metric, and c) pointing out the hypocrisy of your writing about misinformation in this thread and then posting that very thing yourself.
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Keep going. Your colors are starting to show.
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The maximum pressure you should ever need to use on any Hed Plus or BLACK rim is 90 psi (6.2 bar) – even with a narrow 23mm tire. It’s true! We’re not kidding!
That’s not because 100 psi is dangerous for our rim, but because the ideal range is 65-80 psi for a 77kg (170lb) athlete. As a point of reference, the old school method said that higher pressure was always better, with many athletes using 120 psi or more for a 23mm tire.
That’s not because 100 psi is dangerous for our rim, but because the ideal range is 65-80 psi for a 77kg (170lb) athlete. As a point of reference, the old school method said that higher pressure was always better, with many athletes using 120 psi or more for a 23mm tire.
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#60
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What are these guys afraid of? Blowing up the rim or blowing the tyre off of the rim?
Lets just say the most other charts seem to recommend much higher pressure. Then again you should not exceed whatever it says in the tyre itself.
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Translation: If you are 175 lbs you should run 72 psi in a 23 mm and 62 psi in a 28 mm ... All of a sudden I understand the fear of pinch flatting ... :-)
What are these guys afraid of? Blowing up the rim or blowing the tyre off of the rim?
Lets just say the most other charts seem to recommend much higher pressure. Then again you should not exceed whatever it says in the tyre itself.
What are these guys afraid of? Blowing up the rim or blowing the tyre off of the rim?
Lets just say the most other charts seem to recommend much higher pressure. Then again you should not exceed whatever it says in the tyre itself.
I'm 164 and run a 25c tubed GP5K at 68F/71R on my HED Ardennes Plus Black Edition wheels with a 21mm internal width. I haven't pinch flatted in nearly 6 years of riding wide rims. The only time I run them above 75 is if I know I'll be spending significant time on gravel roads, racing on the glass-smooth blacktop of Portland International Raceway, or am going to gun a gravel KOM at mach cheese.
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#62
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I have no idea what constitutes "a wider rim" but the claims sure sound like kool aid. 62 psi in a 28 mm is decidedly soft. I cant imagine its all of sudden not soft because you widen the rim a few mm. Why would you even go there and add a bunch of rolling resistance.
if you are 164 why deviate from the recommended 67 psi. Afraid of a pinch flat? ;-)
if you are 164 why deviate from the recommended 67 psi. Afraid of a pinch flat? ;-)
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I have no idea what constitutes "a wider rim" but the claims sure sound like kool aid. 62 psi in a 28 mm is decidedly soft. I cant imagine its all of sudden not soft because you widen the rim a few mm. Why would you even go there and add a bunch of rolling resistance.
BTW, there isn't a huge increase in rolling resistance.
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72psi on and old 14mm inner width hoop(with a tube), isn't going to work for most people that weigh more than a fart.
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I think all that anyone wants is some sorta data to support these pressures as being a good idea.
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I'm not gonna try to explain their train of thought, but I'm sure if you read the article, it will explain everything you need to know.
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I have no idea what constitutes "a wider rim" but the claims sure sound like kool aid. 62 psi in a 28 mm is decidedly soft. I cant imagine its all of sudden not soft because you widen the rim a few mm. Why would you even go there and add a bunch of rolling resistance.
if you are 164 why deviate from the recommended 67 psi. Afraid of a pinch flat? ;-)
if you are 164 why deviate from the recommended 67 psi. Afraid of a pinch flat? ;-)
I'm not deviating at all, as a range is implied from the graph. 67 is a nice smooth ride, but I found that 68/71 behaved better in the corners.
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#70
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Informed opinion? Thats rich! :-)
You and NS are the ones making unusual claims, regurgitating the HED blurb and then ask others to do the homework to back it up.
You and NS are the ones making unusual claims, regurgitating the HED blurb and then ask others to do the homework to back it up.
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OK, now the OP has learned by the many posts from our members that a lot of us don't read the OP before responding to it.
With that settled, the OP simply for his information should just be advised that the tire (specific tire, brand, model, and year) he asks about is the lowest price road bike tire Bontrager makes. (It is still a fine and economically low price tire.) But if he is also looking for a Bontrager higher-performing clincher tire then Trek/Bontrager offer's him at least four or five other tire choices. (All of which at the same size as his current tire offer higher but not the same pressures that are on his current tire. That's because their pressure ranges are specific to them, just like the OP's tire pressure range is specific to it!)
With that settled, the OP simply for his information should just be advised that the tire (specific tire, brand, model, and year) he asks about is the lowest price road bike tire Bontrager makes. (It is still a fine and economically low price tire.) But if he is also looking for a Bontrager higher-performing clincher tire then Trek/Bontrager offer's him at least four or five other tire choices. (All of which at the same size as his current tire offer higher but not the same pressures that are on his current tire. That's because their pressure ranges are specific to them, just like the OP's tire pressure range is specific to it!)
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OK, now the OP has learned by the many posts from our members that a lot of us don't read the OP before responding to it.
With that settled, the OP simply for his information should just be advised that the tire (specific tire, brand, model, and year) he asks about is the lowest price road bike tire Bontrager makes. (It is still a fine and economically low price tire.) But if he is also looking for a Bontrager higher-performing clincher tire then Trek/Bontrager offer's him at least four or five other tire choices. (All of which at the same size as his current tire offer higher but not the same pressures that are on his current tire. That's because their pressure ranges are specific to them, just like the OP's tire pressure range is specific to it!)
With that settled, the OP simply for his information should just be advised that the tire (specific tire, brand, model, and year) he asks about is the lowest price road bike tire Bontrager makes. (It is still a fine and economically low price tire.) But if he is also looking for a Bontrager higher-performing clincher tire then Trek/Bontrager offer's him at least four or five other tire choices. (All of which at the same size as his current tire offer higher but not the same pressures that are on his current tire. That's because their pressure ranges are specific to them, just like the OP's tire pressure range is specific to it!)
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There’s no homework needed here. All the understanding that is needed is to know that larger volume requires less pressure to maintain the same “hardness”. You should be able to see that by pumping your 23’s up to 120 psi and comparing them to a MTB tire pumped up to 45 psi. Feels about the same. A wider rim creates more volume, hence, less pressure.
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Enve states these as starting pressures based on Tubeless. Even so, though we know that eg. 70psi TL will be better than 70psi tubed, but do we know that recommended 72psi TL is better than 80 or 85psi TL? If so, in what way is it better (comfort only, speed only, comfort and speed)?