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  #1  
Old 09-28-2020, 09:53 PM
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vqdriver vqdriver is offline
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ultra small leak in tubeless

i've got a slow leak somewhere on my 29er tubeless tire. i've been on tubeless for a while now and i feel comfortable working with them, but this leak is very slow and very persistent. i'm losing pressure over the course of a weekend and wherever it is, it's not enough to produce bubbles in ye old dunk test. i suspect the leak is too small to push sealant out the hole. i've tried reseating and replacing the valve core, laying the wheel on either side over night in case of a sidewall leak, and removing/reseating the tire in case of a bead leak. no go

any other ideas?
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Old 09-28-2020, 09:55 PM
yinzerniner yinzerniner is online now
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Quote:
Originally Posted by vqdriver View Post
i've got a slow leak somewhere on my 29er tubeless tire. i've been on tubeless for a while now and i feel comfortable working with them, but this leak is very slow and very persistent. i'm losing pressure over the course of a weekend and wherever it is, it's not enough to produce bubbles in ye old dunk test. i suspect the leak is too small to push sealant out the hole. i've tried reseating and replacing the valve core, laying the wheel on either side over night in case of a sidewall leak, and removing/reseating the tire in case of a bead leak. no go

any other ideas?
Possibly need to replace rim tape. Slightly leaky take wouldn't produce bubbles in the dunk test but could be just enough to lose pressure over a weekend.
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  #3  
Old 09-28-2020, 09:57 PM
mulp mulp is offline
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Have you tried keeping the entire wheel submerged in water to see if any bubbles come out? Not sure if your dunk test was trying wet the tire vs complete submersion?
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Old 09-28-2020, 10:45 PM
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vqdriver vqdriver is offline
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submerged. i fill a trough and turn the wheel thru it.

i'll have to look at the tape. nothing else to check i suppose.
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  #5  
Old 09-28-2020, 10:54 PM
MikeD MikeD is online now
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Losing pressure over a weekend? Normal, even for tubes.


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  #6  
Old 09-28-2020, 11:05 PM
unterhausen unterhausen is offline
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you sure you don't need to add sealant?
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  #7  
Old 09-28-2020, 11:51 PM
avalonracing avalonracing is offline
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Could be around the bead of the rim if the tire and rim aren't a good pair-up.
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  #8  
Old 09-29-2020, 12:55 AM
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vqdriver vqdriver is offline
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Nope

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Originally Posted by MikeD View Post
Losing pressure over a weekend? Normal, even for tubes.


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Old 09-29-2020, 04:52 AM
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SlowPokePete SlowPokePete is online now
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Nope
Could it be your "location?"

SPP
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