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-   -   ultra small leak in tubeless (https://forums.thepaceline.net/showthread.php?t=259013)

vqdriver 09-28-2020 09:53 PM

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?

yinzerniner 09-28-2020 09:55 PM

Quote:

Originally Posted by vqdriver (Post 2803287)
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.

mulp 09-28-2020 09:57 PM

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?

vqdriver 09-28-2020 10:45 PM

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.

MikeD 09-28-2020 10:54 PM

Losing pressure over a weekend? Normal, even for tubes.


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unterhausen 09-28-2020 11:05 PM

you sure you don't need to add sealant?

avalonracing 09-28-2020 11:51 PM

Could be around the bead of the rim if the tire and rim aren't a good pair-up.

vqdriver 09-29-2020 12:55 AM

Nope

Quote:

Originally Posted by MikeD (Post 2803317)
Losing pressure over a weekend? Normal, even for tubes.


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SlowPokePete 09-29-2020 04:52 AM

Quote:

Originally Posted by vqdriver (Post 2803356)
Nope

Could it be your "location?"

SPP


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