Go Back  Bike Forums > Bike Forums > General Cycling Discussion
Reload this Page >

Guess I *won't* be going tubeless

Search
Notices
General Cycling Discussion Have a cycling related question or comment that doesn't fit in one of the other specialty forums? Drop on in and post in here! When possible, please select the forum above that most fits your post!

Guess I *won't* be going tubeless

Thread Tools
 
Search this Thread
 
Old 10-09-18, 03:36 PM
  #101  
pvillemasher
Senior Member
 
pvillemasher's Avatar
 
Join Date: Sep 2013
Location: Austin Texas USA
Posts: 343

Bikes: 1989 Trek 400, 2000 Lemond Buenos Aires, 2013 GT Attack, 2017 Lynskey R250

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 126 Post(s)
Liked 12 Times in 10 Posts
Originally Posted by u235
Of course it was right. I'm sure if they were tubed clinchers and got a sudden tire failure or flat at 40 mph, they would have done a nice controlled slow down and exit to the side of the road and been fine.
I am assuming that with a tubeless tire, if it blows off you're riding on the (very slippery) rims. I don't know, never have ridden tubeless.
With tubed tires I've had a couple of flats going fast downhill but only on the rear, but in every case that I have had a flat the tube tire stayed on the rim. That at least gave me time to get the bike under control to a stop.
pvillemasher is offline  
Old 10-09-18, 03:42 PM
  #102  
cyccommute 
Mad bike riding scientist
 
cyccommute's Avatar
 
Join Date: Nov 2004
Location: Denver, CO
Posts: 27,362

Bikes: Some silver ones, a red one, a black and orange one, and a few titanium ones

Mentioned: 152 Post(s)
Tagged: 1 Thread(s)
Quoted: 6219 Post(s)
Liked 4,218 Times in 2,365 Posts
Originally Posted by gregf83
So are you not supposed to use soap to mount the tire? Seems like it could also impact the effectiveness of sealant.
No, soap is used to mount the tire, although that is just to aid the installation. It should have no impact on the sealant. The residual soap will also decrease the friction of the bead on the rim. The soap may get a little tacky on the rim but, all things considered, a dry rim/tire interface is going to have higher friction than anything else.
__________________
Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!



cyccommute is offline  
Old 10-09-18, 03:52 PM
  #103  
cyccommute 
Mad bike riding scientist
 
cyccommute's Avatar
 
Join Date: Nov 2004
Location: Denver, CO
Posts: 27,362

Bikes: Some silver ones, a red one, a black and orange one, and a few titanium ones

Mentioned: 152 Post(s)
Tagged: 1 Thread(s)
Quoted: 6219 Post(s)
Liked 4,218 Times in 2,365 Posts
Originally Posted by joelcool
My new bike came set up tubeless with Mavic rims 700X25. I've been running 90 to 100 psi. Got a puncture yesterday on the rear, the darned thing sprayed sealant all over the back of the bike, my water bottle, legs, etc. Huge mess.

I was only about 2 miles from home so I continued home with one more spraying incident. Once I got home I removed those rims and put my carbon clinchers on.

I'm done until the technology is better equipped to deal with higher pressures.
I think your problem may be related to the object forming the puncture. I don't use sealant of any kind and will leave a goathead, for example, in place because the thorn serves as a plug and can sometimes get me a few miles further down the road. But someone who does use sealant told me that it is more effective if you remove whatever is puncturing the tire. The whole point of the sealant is for it to push into the hole and form the polymer of the latex in the sealant...that waterproof, undissolvable material that is so tenacious...which plugs the hole. If you leave the goat head in place, each time the goat head hits the pavement, it flexes the thorn and opens the hole again. The flexing keeps the hole from closing entirely and decreases the effectiveness of the sealant.

The sealant should be able to seal a huge hole but not if you keep opening it. From your description, it sounds like the object was still in the tire and not allowing it to seal. On the other hand, higher pressure tires are more likely to blow the plug out of a large hole and cause fountains of goop.
__________________
Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!



cyccommute is offline  
Old 10-09-18, 04:14 PM
  #104  
gregf83 
Senior Member
 
Join Date: Jun 2008
Location: Vancouver, BC
Posts: 9,201
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 1186 Post(s)
Liked 289 Times in 177 Posts
Originally Posted by dddd
That's happened on some of our club rides around Loomis and Granite Bay, and I cringe at the thought of getting "showered" by someone's sealant spraying in front of me.
That stuff ain't coming out of clothing in the wash.
+1. It's like a rider continuing to blow snot balls for the whole ride. We had one recently and it kept spitting for at least an hour. We sent the rider to the back.
gregf83 is offline  
Old 10-09-18, 06:41 PM
  #105  
MattTheHat 
Senior Member
Thread Starter
 
MattTheHat's Avatar
 
Join Date: Aug 2018
Location: Allen, TX
Posts: 2,635

Bikes: 2021 S-Works Turbo Creo SL, 2020 Specialized Roubaix Expert

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 762 Post(s)
Liked 4,035 Times in 1,429 Posts
I picked up a new pair of Roubaix Pros tonight. Sidewall pressure rating is 45-90 PSI. Used two wraps of Stan’s yellow rim tape without the spoke plugs. Installed the tires dry, initially starting the seal at 30 PSI and then slowly increasing pressure to 70 PSI on the front, 90 PSI on the rear, until the bead set evenly. Used 2.5 ounces of Stan’s Race seal figuring I’d lose some from run out and some would stay in the measuring cup.

These tires were much more rubbery at the bead, than the old ones, but that could simply be bacause the other tires had a few hundred miles on them. They seem to be holding air better so far too, but I’ll know better about that in the morning.

-Matt
MattTheHat is offline  
Old 10-09-18, 06:49 PM
  #106  
spdntrxi
Senior Member
 
Join Date: Oct 2013
Location: East Bay Area ,CA
Posts: 1,762

Bikes: not enough

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 189 Post(s)
Liked 86 Times in 52 Posts
Originally Posted by joelcool
My new bike came set up tubeless with Mavic rims 700X25. I've been running 90 to 100 psi. Got a puncture yesterday on the rear, the darned thing sprayed sealant all over the back of the bike, my water bottle, legs, etc. Huge mess.

I was only about 2 miles from home so I continued home with one more spraying incident. Once I got home I removed those rims and put my carbon clinchers on.

I'm done until the technology is better equipped to deal with higher pressures.
so you got home without stopping... the technology did what it was designed to do then ?

I know sealant showers are no fun....I've had my share.
spdntrxi is offline  
Old 10-09-18, 08:30 PM
  #107  
veganbikes
Clark W. Griswold
 
Join Date: Mar 2014
Location: ,location, location
Posts: 13,519

Bikes: Foundry Chilkoot Ti W/Ultegra Di2, Salsa Timberjack Ti, Cinelli Mash Work RandoCross Fun Time Machine, 1x9 XT Parts Hybrid, Co-Motion Cascadia, Specialized Langster, Phil Wood Apple VeloXS Frame (w/DA 7400), R+M Supercharger2 Rohloff, Habanero Ti 26

Mentioned: 54 Post(s)
Tagged: 0 Thread(s)
Quoted: 4355 Post(s)
Liked 3,994 Times in 2,665 Posts
I gotta say using Stans Rims and a Maxxis Tire with Stan's Sealant is super easy to mount having done it 3 times now for a customer (though the tires he bought have some defects hence the third time doing it) I always heard the horror stories and hard to seat beads but this was almost too easy. I didn't bother removing a valve core I just poured the 2oz in the tire and bingo bango bongo I was inflated and ready to ride (if it were my bike).

I hope one day all the rim and tire brands will come together and sit down at the table and say "this is how we should make the rims and this is how we should make the tires" so everyone is on the same page and make this whole business much easier. It is redonkulus that it still has to be such a PITA after how many years of tubeless being out for bikes.
veganbikes is offline  
Old 10-09-18, 09:35 PM
  #108  
MattTheHat 
Senior Member
Thread Starter
 
MattTheHat's Avatar
 
Join Date: Aug 2018
Location: Allen, TX
Posts: 2,635

Bikes: 2021 S-Works Turbo Creo SL, 2020 Specialized Roubaix Expert

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 762 Post(s)
Liked 4,035 Times in 1,429 Posts
First ride about 22 miles, roads are wet so I took it fairly easy. Rode for about an hour and a half. Rear tire lost 2.5 PSI. Not bad, and I hope it gets better. Front tire lost 34 PSI. Not so good, but hopefully after a couple of days it will seal better.

-Matt
MattTheHat is offline  
Old 10-09-18, 10:01 PM
  #109  
pdoege
Senior Member
 
Join Date: Jan 2012
Posts: 156
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 70 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Matt -

2.5 PSI is about right for the first ride on a tire, but 34PSI means that your tape or valve stem is leaking, and leaking a lot. I don't think that will fix itself.
pdoege is offline  
Old 10-10-18, 08:54 AM
  #110  
MattTheHat 
Senior Member
Thread Starter
 
MattTheHat's Avatar
 
Join Date: Aug 2018
Location: Allen, TX
Posts: 2,635

Bikes: 2021 S-Works Turbo Creo SL, 2020 Specialized Roubaix Expert

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 762 Post(s)
Liked 4,035 Times in 1,429 Posts
Originally Posted by pdoege
Matt -

2.5 PSI is about right for the first ride on a tire, but 34PSI means that your tape or valve stem is leaking, and leaking a lot. I don't think that will fix itself.
This morning I rode just over 30 miles. Rear tire lost 5.5 PSI, front tire lost 29 PSI. The valve stem doesn't appear to be leaking, but it could be. Even if I can figure out what's going on with the front tire and fix it, losing 2-5 PSI in a couple of hours, if that's normal, is reason enough for me not to bother with tubeless. Over the course of a 100 mile ride, that's gong to equate to at least 10 PSI. I can feel the added rolling resistance at 5 PSI.

I could stop and fill up with CO2, but my experience with CO2 in an inner tube is that it leaks out quite a bit in about an hour. Or I guess I could stop and top up the tires with a mini pump, though it would take a bit longer. With inner tubes, I wouldn't have to bother.

-Matt
MattTheHat is offline  
Old 10-10-18, 09:01 AM
  #111  
DrIsotope
Non omnino gravis
 
DrIsotope's Avatar
 
Join Date: Feb 2015
Location: SoCal, USA!
Posts: 8,553

Bikes: Nekobasu, Pandicorn, Lakitu

Mentioned: 119 Post(s)
Tagged: 0 Thread(s)
Quoted: 4905 Post(s)
Liked 1,731 Times in 958 Posts
If you're losing any notable amount of pressure over just 30 miles, something is leaking. Tape, valve stem, valve core, something. Whatever I air a tire to before a 90 minute ride is what the pressure is at when I get home-- provided there's no punctures.

I guess I should be thankful though that I can't feel a difference of 5psi. I started to notice my rear 700x25 feeling sluggish one ride, just kept on with the ride. Got home and it had 40psi in it. Still rode pretty well. Over the last half of the ride or so, my average speed was down about 1mph.
__________________
DrIsotope is offline  
Old 10-10-18, 09:04 AM
  #112  
joelcool
Senior Member
 
joelcool's Avatar
 
Join Date: May 2017
Location: Folsom, CA
Posts: 303

Bikes: Road, Commuter, Mountain, Tandem and a couple others

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 87 Post(s)
Likes: 0
Liked 41 Times in 27 Posts
Originally Posted by spdntrxi
so you got home without stopping... the technology did what it was designed to do then ?

I know sealant showers are no fun....I've had my share.
True, I did get home without stopping. However once I did get home it took me far longer to clean up the mess than it would have to swap the tube on the road. I'll wait for some "high pressure sealant" that won't blow snot... until then I'll happily ride old school with tubes.
joelcool is offline  
Old 10-10-18, 09:14 AM
  #113  
MattTheHat 
Senior Member
Thread Starter
 
MattTheHat's Avatar
 
Join Date: Aug 2018
Location: Allen, TX
Posts: 2,635

Bikes: 2021 S-Works Turbo Creo SL, 2020 Specialized Roubaix Expert

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 762 Post(s)
Liked 4,035 Times in 1,429 Posts
Originally Posted by DrIsotope
If you're losing any notable amount of pressure over just 30 miles, something is leaking. Tape, valve stem, valve core, something. Whatever I air a tire to before a 90 minute ride is what the pressure is at when I get home-- provided there's no punctures.

I guess I should be thankful though that I can't feel a difference of 5psi. I started to notice my rear 700x25 feeling sluggish one ride, just kept on with the ride. Got home and it had 40psi in it. Still rode pretty well. Over the last half of the ride or so, my average speed was down about 1mph.
Interesting. How much sealant are you running? The tape doesn't seem like rocket science, but I guess it could be leaking.

I'm not sure I'f I'm really feeling the 5 PSI or not. I do think I can feel 10 PSI. It could be that what I think I'm feeling at 5 PSI could have more to do with the fact that these tires have considerably more rolling resistance than the GP400SIIs I'd been running, but that's to be expected.

-Matt
MattTheHat is offline  
Old 10-10-18, 10:50 AM
  #114  
cyclintom
Senior Member
 
Join Date: Aug 2005
Location: San Leandro
Posts: 2,900

Bikes: Eddy Merckx Corsa Extra, Basso Loto, Pinarello Stelvio, Redline Cyclocross

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 336 Post(s)
Likes: 0
Liked 2 Times in 1 Post
Originally Posted by MattTheHat
I picked up a new pair of Roubaix Pros tonight. Sidewall pressure rating is 45-90 PSI. Used two wraps of Stan’s yellow rim tape without the spoke plugs. Installed the tires dry, initially starting the seal at 30 PSI and then slowly increasing pressure to 70 PSI on the front, 90 PSI on the rear, until the bead set evenly. Used 2.5 ounces of Stan’s Race seal figuring I’d lose some from run out and some would stay in the measuring cup.

These tires were much more rubbery at the bead, than the old ones, but that could simply be bacause the other tires had a few hundred miles on them. They seem to be holding air better so far too, but I’ll know better about that in the morning.

-Matt
I was working a stop on a double century last weekend and some guy was talking about using tubeless. I looked at his tire and there was a rather large stone stuck in it. I pulled it out but it looked like it hadn't pierced the cord. I couldn't feel or hear any air leakage. Later I looked again and the Stans had sealed the hole and there was a small round rubber bead at the spot the rock was. The funny thing was that it was at the top of the tire and you'd expect that the sealant would only be at the bottom of the tire and you'd have to spin the tire to get sealant in it. So I guess that the Stans had bunched around that puncture while he was riding and when I pulled the rock out it sealed so rapidly that you couldn't tell it was a real puncture.
cyclintom is offline  
Old 10-10-18, 01:43 PM
  #115  
sirkaos
Senior Member
 
sirkaos's Avatar
 
Join Date: Dec 2016
Location: Santa Clarita, CA
Posts: 138

Bikes: 2017 Specialized Roubaix Expert, Surley Karate Monkey 29er hard tail

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 79 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
I am using Orange Endurance (4 oz..) in Schwalbe Pro One 28C tires at 85psi up front and 90 psi in the rear. I originally have used Stans in my Karate Monkey hard tail 29er and it seem to work fine at 25-30psi. Did not like Stans at all for the higher pressures. I am using the Reynolds Assault carbon rims that have worked well with the Pro Ones. A couple of things that have helped me to seal the tire the first time mounting. One is that I do it in the afternoon after setting the new tire in the sun for few hours. I find it is a bit more flexible for the first time sealing. After cleaning the rims and tires with Isopropyl alcohol, I get the tire on the rim, and use a small cheap throwaway acid brush and paint a little Orange Endurance around the sealing area of the tire and rim. I next use a pancake air compressor/ Schrader valve air gun to pop the tire and only go up to 30 psi. I slowly rotate the tire and allow the sealant to coat the inside for any possible slow leaks. I check it under water after ten minutes and then I go up to the desired pressure.
One time I caught a construction screw into the tire at the end of the ride, when I stop for the required coffee and blue berry muffin. The sealant was spraying everywhere. I rolled the bike over to a dirt patch and just rubbed the tire into dirt where the leak was and of course some dirt stuck to the tire. It was a big hole, but it sealed perfectly. I filled the water bottle and just sprayed a some water and rubbed a little to get the majority of the sealant off the bike and had very little clean up at home. A wet rag did the rest. I also use that 3M film plastic to protect the paint on the seat stays and downtube. The orange sealant slightly discolored the plastic, but not much.
I have about 3000 miles this year over rough LA county roads and have no blow outs, or catastrophic failures. I have much more confidence in the set up I now have than before, and it is definitely faster.

Tubeless works for me.
sirkaos is offline  
Old 10-10-18, 04:55 PM
  #116  
pvillemasher
Senior Member
 
pvillemasher's Avatar
 
Join Date: Sep 2013
Location: Austin Texas USA
Posts: 343

Bikes: 1989 Trek 400, 2000 Lemond Buenos Aires, 2013 GT Attack, 2017 Lynskey R250

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 126 Post(s)
Liked 12 Times in 10 Posts
Well this guy makes tubeless look like a great way to go. Is it the Mavic system he is using? This video is dated April 2018 so maybe there have been improvements.
A side note: If you haven't seen his other videos, look for The Col Collective videos. Love these vids, this guy tackles the worlds best climbs. Wonderful stuff.

pvillemasher is offline  
Old 10-10-18, 06:41 PM
  #117  
pdoege
Senior Member
 
Join Date: Jan 2012
Posts: 156
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 70 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Matt - Are able to use a dispensing needle to add sealant thru the valve core? One way to fix leaks like this is to dump a crapload of sealant, like a half bottle, in via the core and then inflate/swirl. Filling the tires cross section with fluid and then rotating the tire makes sure the fluid is forced through the leak.

One sealed you suck the extra fluid out of the valve core using the needle in reverse.

I used this to seal up the last Roval/Specialized 2Bliss tire set that I used and did not have a problem thereafter.

(Link to dispensing needle: https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 )
pdoege is offline  
Old 10-11-18, 03:26 AM
  #118  
Doug5150
Senior Member
 
Join Date: May 2005
Location: IL-USA
Posts: 1,859
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 111 Post(s)
Likes: 0
Liked 5 Times in 5 Posts
Originally Posted by MattTheHat
I found this scene when I went out to ride this morning:
...
Gives me the willies thinking about the carnage if that would have happened going 40 miles per hour somewhere. Wheels are Roval SLX 24, tires are Specialized Roubaix Pro. Both are supposed to be tubeless. ...
I am wondering if either bead has suffered any damage? Does the tire still mount properly? Does either bead appear to lift off really easily now?

A lot of the general problems of tubeless tires involves the kevlar beads breaking. In the early days of the Stans MTB setups, the vast majority of reports of (conventional, non-tubeless) MTB tires blowing off was tires with kevlar beads. It was rarely ever reported with steel-bead tires.

Once a kevlar-bead MTB tire blew off, the bead itself was totally broken and the tire was ruined. I am wondering here if a road tire bead could fail enough to lift over the rim, but still appear to be undamaged?...

I think that if the tire companies returned to using steel beads, they would avoid a lot of these problems. A kevlar bead stretches about six times as far as a steel bead does.

Warning: I've not used any bicycle tubeless tires yet at all.

Why I aint tried tubeless yet:
There are still problems with lack of standardization among bicycle tubeless tire & rim systems.
At this point it is still my belief that if you buy tubeless rims, you should expect to run ONLY tires meant for that specific tubeless rim type.
And normal clinchers may not work reliably on your tubeless rims either, even though most tubeless rims makers claim they do.

-----

I tend to think that tubeless is the future, but it will need to be standardized--so that all the tire companies can make one style of tubeless bead and know that it will work correctly on all tubeless rims. Just like what they do now with regular clincher tires.

And that future tubeless will be 'dry' tubeless, without using any internal puncture sealant.
The liquid sealant causes a lot of problems, and most people don't need such aggressive flat protection. The sealant works great when it works, but is a huge mess when it doesn't work.
To fix a puncture in a dry-tubeless tire, you will just stick some glue and a patch on the inside.
Doug5150 is offline  
Old 10-11-18, 07:43 AM
  #119  
Caveman Grog
Junior Member
 
Join Date: Oct 2018
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
This thread has gone crazy

There is a large amount of questionable information that has been offered in the thread.
-Rim tape if installed at the correct width has zero effect on the bead of the tire.
-Using over 200 ounces of sealant to initially seal the tie is completely incorrect and unnecessary.
-Tubless tires do not use Kevlar bead material but rather carbon fiber because it does not stretch as much as Kevlar. This is why a standard clincher will become easy to remove without levers after some use but that dis not happen with tubeless tires. Any time I need to actually tube a tire to finish a ride the removal required levers.
-Mavic UST notwithstanding (but I am of the belief that it is similar), tubeless tire bead and tubeless compatible rim beads lock together to help form the seal needed. This results in an interface that won’t easily just blow off the rim. This in fact was one of the benefits touted in Hutchinson print ads for tubeless tires several years ago.
-Industry standard for proof pressure of a tire is two times it’s rated value. This alone removes any doubt as to whether pressure caused damage to OP’s tire.
-While I have no information to disprove or prove that tubless has a higher failure rate, it makes little sense without facts to support the assertion.

I have no personal experience with road tubeless tires of that width but have ridden Hutchinson and Schwalbe tires of various models with four different rims of three different brands for over 10 years and tens of thousands of miles with many flats including ones that made the tire unrepairable and have not experienced one tire failure resulting in an unsafe condition. This has all been at higher road tire pressures of between 80-110 psi with 23c widths. The beads always require force to unseat after flatting only reassuring me that the safety of the system is a real benefit (have had a tubed tire come off the rim from a blowout) I ride over 10k/year and race with lots of mountainous descending and high speed use (50mph+) with complete confidence. In fact I personally feel safer on tubeless tires as I know compatible combos of tire and wheel will stay together in the unlikely event of a blowout.

I cannot speculate how the OP’s tire could have spontaneously removed itself from the rim but am confident it is not a normal occurrence at all. I mean not to offend anybody, am only sharing facts as I have learned them and personal experience. I am a complete tubless supporter. It blends most of the benefits of tubed and tubular tires together. They can be a hassle to initially set up (but experience has help reduce that effort) compared to installation of a tube but significantly less than gluing on a tire.
Caveman Grog is offline  
Old 10-11-18, 08:22 AM
  #120  
aclinjury
Senior Member
 
Join Date: May 2013
Posts: 660
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 497 Post(s)
Liked 170 Times in 128 Posts
Originally Posted by CliffordK
I don't quite have 1000 miles on the front yet, but so far no flats, no leaks, and haven't re-pumped it yet.

But, yes, that is about what I get, one flat every 1000 miles or so... perhaps a half dozen a year (including a couple of bikes, trailers, etc).

I have to wonder how long until we start seeing some heavy-duty road tires coming out in tubeless.

Perhaps some vendors are waiting for others to shake out the problems before putting their flagship tires out as tubeless.

Perhaps the Gator Hardshell in tubeless?

They're coming. Perhaps in a decade we'll all be asking what tubes are

Very few car tires in the USA from the last 10 years take tubes, and most of those would be very vintage tires.
Give yourself more time before you paint a too rosy picture for tubeless. Once a tubeless tire starts to wear down the meat of its rubber, then its ability to seal a hole (even a small one) diminishes dramatically. And if a hole was sealed when the tire was still relatively new, then the same hold could pop open once the tire wears down a bit. What this means is that you almost never could come close to using the entire lifespan of a tubeless tire without resorting to putting in a tube in the later stage of its life. And this effectively raises the "cost of ownership" of a "tubeles" tire (because you can't use it tubeless for its entirety). Another con against tubeless tire is that once a tubeless tire is mounted and used, its bead will stretch compared to when new, so re-mounting it again will almost always require compressed air and still it may be more prone to to leaking air compared to when tire was new. I have had at least 2 tubeless tires that did this to me and ended up sticking a tube in to get some more usage out of them (and putting a tube in a tubeless tire means cleaning the damn gunk off). I finally came to the conclusion that tubeless is nice when tire is new, then not nice as tire wears down. Back to regular clinchers for me, where I can buy them on sale pretty much at any given time on the various big online sellers, lowers cost of ownership, which is important for me since I have 4 bikes to up keep.

Last edited by aclinjury; 10-11-18 at 08:27 AM.
aclinjury is offline  
Old 10-11-18, 08:37 AM
  #121  
cyccommute 
Mad bike riding scientist
 
cyccommute's Avatar
 
Join Date: Nov 2004
Location: Denver, CO
Posts: 27,362

Bikes: Some silver ones, a red one, a black and orange one, and a few titanium ones

Mentioned: 152 Post(s)
Tagged: 1 Thread(s)
Quoted: 6219 Post(s)
Liked 4,218 Times in 2,365 Posts
Originally Posted by Caveman Grog
There is a large amount of questionable information that has been offered in the thread.


Before you go claiming that people are offering questionable information, you need to check your own information.

Originally Posted by Caveman Grog
-Using over 200 ounces of sealant to initially seal the tie is completely incorrect and unnecessary.
You need to edit this. I don't think you mean 200 ounces. That's 1.5 gallons.

Originally Posted by Caveman Grog
-Tubless tires do not use Kevlar bead material but rather carbon fiber because it does not stretch as much as Kevlar. This is why a standard clincher will become easy to remove without levers after some use but that dis not happen with tubeless tires. Any time I need to actually tube a tire to finish a ride the removal required levers.
Sorry but nope. At least not for all tires. From Schwalbe's website

. In folding tires, the wire is replaced with a hoop of aramid fibers.
Some of their tires may have carbon beads and some companies are making tires with carbon beads but that's a relatively new innovation. Tubeless has been around for a very long time and there are lots and lots and lots of tires out there with Kevlar...i.e. aramid...beads.


Originally Posted by Caveman Grog
-Mavic UST notwithstanding (but I am of the belief that it is similar), tubeless tire bead and tubeless compatible rim beads lock together to help form the seal needed. This results in an interface that won’t easily just blow off the rim. This in fact was one of the benefits touted in Hutchinson print ads for tubeless tires several years ago.
With a few exceptions, the beads on tubeless ready rims is just a hook bead. They fit just about any tire and I haven't noticed any significant difference between a tubeless ready rim and one that isn't tubeless ready. Nor have I noticed any difference between tubeless ready tires and other tires. I put Schwalbe Pro 1 HS tires on with tubes and didn't notice any difference between the bead on those and the non-tubeless Vittoria it replaced.

Originally Posted by Caveman Grog
-Industry standard for proof pressure of a tire is two times it’s rated value. This alone removes any doubt as to whether pressure caused damage to OP’s tire.
Link or citation please.
__________________
Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!



cyccommute is offline  
Old 10-11-18, 09:54 AM
  #122  
Caveman Grog
Junior Member
 
Join Date: Oct 2018
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Tire pressure

I’m unable to find that specific information. This is information I learned about tire pressures in the 90’s, I recall reading that. While tires do have their maximum rated pressure listed on the sidewall, it would be quite perilous if that were the limit at which the tire would hold together. There are severalvariables at work between ambient temp, braking, and rider weight. Though very informal here is a link to a YouTube video of someone trying to see how much pressure a tire would take before bursting. Have a look at this. youtu.be/SDLVBPspSK4
Caveman Grog is offline  
Old 10-11-18, 10:11 AM
  #123  
sirkaos
Senior Member
 
sirkaos's Avatar
 
Join Date: Dec 2016
Location: Santa Clarita, CA
Posts: 138

Bikes: 2017 Specialized Roubaix Expert, Surley Karate Monkey 29er hard tail

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 79 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
Originally Posted by aclinjury
Give yourself more time before you paint a too rosy picture for tubeless. Once a tubeless tire starts to wear down the meat of its rubber, then its ability to seal a hole (even a small one) diminishes dramatically. And if a hole was sealed when the tire was still relatively new, then the same hold could pop open once the tire wears down a bit. What this means is that you almost never could come close to using the entire lifespan of a tubeless tire without resorting to putting in a tube in the later stage of its life. And this effectively raises the "cost of ownership" of a "tubeles" tire (because you can't use it tubeless for its entirety). Another con against tubeless tire is that once a tubeless tire is mounted and used, its bead will stretch compared to when new, so re-mounting it again will almost always require compressed air and still it may be more prone to to leaking air compared to when tire was new. I have had at least 2 tubeless tires that did this to me and ended up sticking a tube in to get some more usage out of them (and putting a tube in a tubeless tire means cleaning the damn gunk off). I finally came to the conclusion that tubeless is nice when tire is new, then not nice as tire wears down. Back to regular clinchers for me, where I can buy them on sale pretty much at any given time on the various big online sellers, lowers cost of ownership, which is important for me since I have 4 bikes to up keep.
Do you have any proof of this other than your own experience? I have never had to resorting to adding a tube to get the last portion of life out of a tubeless tire.

I would check your technique on re mounting a tubeless tire. When I do it, I do it in a timely efficient manner so the sealant doesn't start to gel. I dismount the tire over the garage sink, put the tire in a 5 gallon bucket with warm soapy water. Clean the rim with a white towel and soap. Orange Endurance comes right off, maybe 5-10 minutes of light rubbing. Then I move onto the tire and use a scrub brush and lay it flat in the bottom of the sink. This takes maybe at most, 10-15 minutes, most important is the sealing edge of the tire. If I have any serious punctures, I will patch those with the Hutchison tubeless patch kit. In 30 minutes, I will have the tire mounted and air in it up to 40 psi to check for leaks. No big deal. Schwalbe Pro Ones with the Orange Endurance sealant is working very well for me. I am getting full life out of the tires at around 2000 miles, which in SoCal, is about norm in our area.

You don't even mention performance and safety in your evaluation of tubeless tires. I am much more interested in how safe a tire is and how it performs. I have found the Schwalbe Pro Ones corner much better, roll better, grip better and give a feeling of confidence that my previous tires did not have. My trainer wheels (DT Swiss R470 with Conti's 4000s II) don't perform nearly as well, although they are acceptable.

Last edited by sirkaos; 10-11-18 at 10:12 AM. Reason: wrong word
sirkaos is offline  
Old 10-11-18, 10:56 AM
  #124  
Doug5150
Senior Member
 
Join Date: May 2005
Location: IL-USA
Posts: 1,859
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 111 Post(s)
Likes: 0
Liked 5 Times in 5 Posts
Originally Posted by Caveman Grog
I’m unable to find that specific information. This is information I learned about tire pressures in the 90’s, I recall reading that. While tires do have their maximum rated pressure listed on the sidewall, it would be quite perilous if that were the limit at which the tire would hold together. There are several variables at work between ambient temp, braking, and rider weight. Though very informal here is a link to a YouTube video of someone trying to see how much pressure a tire would take before bursting. Have a look at this. youtu.be/SDLVBPspSK4


His test has the tire bursting at about 220 PSI, which agrees with the only other instance I've seen.

EDIT: I found the old video,,, they changed the beginning part?

This video (on the "How It's Made" UK TV show) shows a Schwalbe MTB tire bursting at about 16 bar (240 PSI). Go to the 4:57 time mark, that's where the bursting test is shown.


-----

In modern times the practical limit of tire pressure is not so much the tire construction as the rim... It should be possible to make a bicycle tire that could withstand ~400 PSI but no rim could take that.
It's not difficult to find examples of people seeing road bike rims split with higher pressures (120 - 150 PSI).
This problem gets dramatically worse with fatter tires. With some MTB rims, the max pressure they give for 3" wide tires is only ~40% of what they give for 2.2" wide tires.

Last edited by Doug5150; 10-11-18 at 11:02 AM. Reason: Found the old video!!! :D
Doug5150 is offline  
Old 10-11-18, 11:52 AM
  #125  
aclinjury
Senior Member
 
Join Date: May 2013
Posts: 660
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 497 Post(s)
Liked 170 Times in 128 Posts
Originally Posted by sirkaos
Do you have any proof of this other than your own experience? I have never had to resorting to adding a tube to get the last portion of life out of a tubeless tire.

I would check your technique on re mounting a tubeless tire. When I do it, I do it in a timely efficient manner so the sealant doesn't start to gel. I dismount the tire over the garage sink, put the tire in a 5 gallon bucket with warm soapy water. Clean the rim with a white towel and soap. Orange Endurance comes right off, maybe 5-10 minutes of light rubbing. Then I move onto the tire and use a scrub brush and lay it flat in the bottom of the sink. This takes maybe at most, 10-15 minutes, most important is the sealing edge of the tire. If I have any serious punctures, I will patch those with the Hutchison tubeless patch kit. In 30 minutes, I will have the tire mounted and air in it up to 40 psi to check for leaks. No big deal. Schwalbe Pro Ones with the Orange Endurance sealant is working very well for me. I am getting full life out of the tires at around 2000 miles, which in SoCal, is about norm in our area.

You don't even mention performance and safety in your evaluation of tubeless tires. I am much more interested in how safe a tire is and how it performs. I have found the Schwalbe Pro Ones corner much better, roll better, grip better and give a feeling of confidence that my previous tires did not have. My trainer wheels (DT Swiss R470 with Conti's 4000s II) don't perform nearly as well, although they are acceptable.
No I don't have any proof other than my experience and what I've seen of others. However, since what we're discussing here is essentially science and not math, one cannot prove anything. One can only disprove, but I digress.
In the mtb world, there are lots of examples where a tubeless tire burp and pop out of the rim, even at low psi. And you raised up the question of safety, which is precisely one of the OP central concerns when posting this thread. But do you have any evidence (not proof) to back up your claim about the Schwalbe Pro One's performance? I ask in an honest way and not out of sarcasm or anything. Lots of guys go tubeless and I hear a lot of claim better "performance" this and that, yet I have yet to see anything remotely resembling evidence. Could you explain how tubeless tire gives better grip when grip is dependent solely on the rubber type and not tire type? Guess what, the cheapest Schwalbe Pro One in 25c anywhere online is like $63, not exactly cheap. But hey if that's what gives you better performance, then who am I to argue.
aclinjury is offline  


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.