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I've been running my wheels tubeless for years and they've been great - pretty much effortless and I've been puncture free.
I've suddenly developed a slow deflation of the front tyre (Terreno TNT), it loses about 60% of its pressure over a couple of days. I've refreshed the sealant and even changed out the old valve cores (I've known these to leak) but with no success. Pressure loss seems minimal over the duration of a ride so I'm loathe to go through the hassle of re-taping just yet but wondered what else I could try.
I've wetted the sidewalls and tread without any sign of bubbling and I can see any bubbling when wetting around the valve and spoke holes; I may stick it in the bath to be doubly certain.
Any ideas?
I literally have just had this issue myself and solved it yesterday. Front tyre slowly deflates over a couple of days. Popped the wheel into a large tub where I could submerge it right over the rim and span it round slowly to see micro leaks around a few spoke nipples. Had to retape the rim.
Also, my tubeless valve was leaking and needed the rubber rim seal changed.
Think you need to stick it in the bath to see where it's coming from like you've mentioned. Could be a slow puncture from a thorn that's still embedded in the tyre also but assume you've checked all around the tyre and if you've ridden it since it would have been likely to have fallen out by now. A seating issue seems less likely given it was fine and is now not. I had something similar and fixed it by retaping, but I did just ride on it for a few months as like you pressure loss during riding was minimal.
Had the same issue, it drove me mad. I retaped in the end and solved the problem.
Same - re-taping the rim with Muc Off tape after using sealant remover and they now stay up forever
Thanks all.
It looks like I'll need to get around to re-taping them at some point, which I'm not looking forward to. I made a bit of a hash of it first time around and ending up having the LBS sort them, but I do have some better sized tape now.
Would isopropyl alcohol suffice for sealant removing duties?
Isopropyl alcohol didn't work for me, too much goo under the tape. The Muc Off sealant remover made short work of it.
IPA did eventually work but it took a lot of it and a lot of scrubbing. Could work in a pinch but I'd try the muc off sealant remover if that's worked better for people.
I used brake disc cleaner to remove any goo under the old tape. Also found muc off tape better than Stanstape.