Hi, i have some S-Works Turbo TLR Race Tyres on my ‘race’ bike. I am wondering how long air should stay in tubeless tires for? I know some are better than others and it depends on the tires, rims (mine are fulcrum DB 800’s) and other stuff too. If i go to 80psi or something, it’ll be down to around 10psi the next day. Not really an issue as i dont ride for 12hours but I sometimes ride it for my endurance rides. I think i got back the other week with around 50psi left in it.
Some of my wheels hold pressure for ages, i havent blown my GP 5000’s up for weeks.
I cant be bothered re-doing the tubeless set up if this is kind of to be expected? In a crit race this isn’t going to affect me.
My tubeless set up wheels/tyres will only lose about 10psi over the course of a week on the road/ TT bikes and I’m guilty of not pumping them up for a couple of weeks too. FWIW 5000’s on my road bikes, a schwalbe on my TT disc and WTB Raddlers on my Gravel bike. I’ll lose less pressure with the gravel bike but its less pressure to start with.
You def have a leak. Did you forget to put sealant in? I’ve been running tubeless for years. I always check and adjust pressure the day of a ride, even if I rode the day before. My tubeless setups always go down enough to matter, but only maybe 10%/day.
This. If you see bubbles through a spoke hole, it’s tape. The vale stem should be self explanatory.
I have a set of Gravelking SK 2.1 for my MTB that 100% will leak around the bead until sealant fills the gaps. Lots of swishing to get that where it needs to be, but once done, they hold air exceptionally well.
It’s probably the rim tape. You might need to retape, but before you do that, do the following with each wheel:
make sure there’s an appropriate amount of fresh sealant in the tire.
drop the wheel from about 6-12” onto the floor so the wheel bounces. This splashes sealant onto the rim tape, and helps seal any holes or gaps in the tape.
Rotate the wheel by a little bit (e.g. about 30 degrees) and repeat
Keep doing this until you rotate the wheel through 3-4 full revolutions.
I don’t quite understand how a tape leak will result in bubbles coming out of spoke holes. I would guess that the air would travel around the inside of the rim and out the spoke holes that arent submerged. air follows the path of least resistance and going through water is probably not that path. ive also never done this on a tubeless wheel so correct me if someone has direct experience
The extra resistance from the water isn’t enough to stop the flow.
Worth remembering that when checking the spokes you aren’t looking for a stream of bubbles necessary. The air flow through the rim tap will be then spread over all the spokes that aren’t themselves airtight - so it might just be a tiny air pocket that forms around a handful of spokes.
x2 on this. When my tubeless tires lose a significant amount of air pressure in a week, I’ll usually change the valve core and 9 times out of 10 it fixes the issue.
tires (some are more solid / air tight then others, I had veloflex tires with barkeeper sealant, not holding enough air over a 3h ride, but with orange seal it was good for a day or 2)
sealant, see point 1, some sealants are better. Sometimes just better, sometimes better in combination with… (barkeeper worked fine in my MTB tires at lower pressure)/
rims, valves, tape, if anything is off there, you will have a leak that won’t help keep the air inside.
You should only see that kind of loss after about six months if you never topped the air in all that time.. Definitely have a leak as suggested by others and tape would also be my guess. The tyre beads popped into place when you initially inflated?
that won’t help keep the air inside.