Tubeless air pressure loss
04-10-23, 10:03 AM
#1
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Tubeless air pressure loss
I've recently switched to tubeless and happy so far, but am concerned about one thing. With tubed tires I rarely needed top 'top them off', they retained air fairly well. I'm finding with the tubeless that I need to refill about once every 4-5 days. Is that right/normal? I had originally been running them with tubes for about a year before switching and wondering if it would alleviate the problem to just get new tires. Nothing wrong with the old ones, so i'd keep them as backups.
*edit* Currently running WTB Riddlers, 37mm. Confirmed they are the tubeless ready version. Rims are WTB ST i23 TCS, 28h, tubeless ready and the conversion was done by my LBS
*edit* Currently running WTB Riddlers, 37mm. Confirmed they are the tubeless ready version. Rims are WTB ST i23 TCS, 28h, tubeless ready and the conversion was done by my LBS
Last edited by Ubie; 04-10-23 at 10:08 AM.
04-10-23, 10:18 AM
#2
Grupetto Bob
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Perfectly normal.
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04-10-23, 01:24 PM
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Any time I go out I check PSI first. Tubeless loses air like crazy compared to clinchers. A small price to pay.
04-10-23, 01:38 PM
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04-10-23, 02:47 PM
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I have found that if you lose a fair amount of air it maybe the valve not tight enough.a couple weeks is about usual for me sometimes longer.
04-10-23, 04:44 PM
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Yes, even within a single manufacturer.
Example...
Continental GP 5000 TL
Vs it's replacement
Continental GP 5000 S TR
The GP 5000 S TR looses significantly more air than the GP 5000 TL when both are setup as tubeless.
Reason
Continental decided to lighten the GP 5000 S TR version by removing the butyl liner that was in the earlier TL version.
It was this butyl liner that was holding the air in. After all, regular bike tubes are made of butyl.
Barry
Example...
Continental GP 5000 TL
Vs it's replacement
Continental GP 5000 S TR
The GP 5000 S TR looses significantly more air than the GP 5000 TL when both are setup as tubeless.
Reason
Continental decided to lighten the GP 5000 S TR version by removing the butyl liner that was in the earlier TL version.
It was this butyl liner that was holding the air in. After all, regular bike tubes are made of butyl.
Barry
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04-10-23, 04:52 PM
#7
Junior Member
I've recently switched to tubeless and happy so far, but am concerned about one thing. With tubed tires I rarely needed top 'top them off', they retained air fairly well. I'm finding with the tubeless that I need to refill about once every 4-5 days. Is that right/normal? I had originally been running them with tubes for about a year before switching and wondering if it would alleviate the problem to just get new tires. Nothing wrong with the old ones, so i'd keep them as backups.
*edit* Currently running WTB Riddlers, 37mm. Confirmed they are the tubeless ready version. Rims are WTB ST i23 TCS, 28h, tubeless ready and the conversion was done by my LBS
*edit* Currently running WTB Riddlers, 37mm. Confirmed they are the tubeless ready version. Rims are WTB ST i23 TCS, 28h, tubeless ready and the conversion was done by my LBS
04-11-23, 04:57 AM
#8
Senior Member
Yes for a few reasons but it's perfectly normal for tubeless tires to lose pressure much faster. Most of it is just they leak more but in general, especially once you get to gravel tires like 37mm you can't run the same pressure especially if you were riding your gravel bike on the road and running it kind of high to begin with. So you start at a lower point already and lose quicker and will have to top off more often as a result.
When I first got my new mountain bike with tubeless tyres, I found initially that they would lose pressure relatively quickly. Over time the rate of loss dropped until now I can leave them several weeks without needing to top them up.I guess the sealant gradually finds all the little leaks and seals them.
