BenGraham Posted January 13, 2016 Posted January 13, 2016 Okay so I've got 26er WTB bronsons on my bike. Rims are inferno 27 converted to tubeless. And they've been just fine since mid last year until recently I rode Melville koppies and they started losing pressure. Yes there was some glass up there but I didn't notice any punctures and I did listen and look. I pumped the wheel back up with a bomb (valve at the top so as not to freeze my sealant) and they held for another 30kms. But now I can't seem to keep them pumped up. They lost around 18 psi last night. I pumped them up to 20psi before going to bed. So what gives. They had their sealant topped up just before christmas (and the rim tape was replaced at the same time) so that surely can have dried out. Has any one got any ideas what the problem might be. My front tyre hasn't given me any trouble but my back one is really irritating me and I'm doing the xterra in a couple weeks and the one thing I'm confident about is the ride so I'll be really annoyed if my tyres don't hold air for the event. Has anyone got any ideas or suggestions?
s14phoenix Posted January 13, 2016 Posted January 13, 2016 valves... I had similar issue and it was dirt or sealant in the valve making it leak just a small amount constantly. Dunk the whole wheel under water and look for bubbles if all else fails....
NotSoBigBen Posted January 13, 2016 Posted January 13, 2016 valves... I had similar issue and it was dirt or sealant in the valve making it leak just a small amount constantly. Dunk the whole wheel under water and look for bubbles if all else fails.... If it worries you that much then do the above it never fails to identify the actual problem
RocknRolla Posted January 13, 2016 Posted January 13, 2016 if you are sans pool, you can also spray some clean green diluted with water onto the wheel....it will soon show little bubbles where the air is escaping...even through the sidewall..
BenGraham Posted January 13, 2016 Author Posted January 13, 2016 Thanks guys. This is helpful advice. I don't have a pool but I'll see if my brother-in-law doesn't mind me using his.
Capricorn Posted January 13, 2016 Posted January 13, 2016 Thanks guys. This is helpful advice. I don't have a pool but I'll see if my brother-in-law doesn't mind me using his.you dont need a pool: just get bucket/basin, with enough depth and width so you can submerge a sector of the wheel up to the spokes. Rotate the wheel so the whole rim gets a chance at a dunking.
I FLY Posted January 13, 2016 Posted January 13, 2016 you dont need a pool: just get bucket/basin, with enough depth and width so you can submerge a sector of the wheel up to the spokes. Rotate the wheel so the whole rim gets a chance at a dunking.I fill up our wheel barrow with water when I want to check for leaks in our tyres
myveonix Posted January 13, 2016 Posted January 13, 2016 Take any spray bottle, fill with diluted dish washing liquid, spray on and, as with LPG leaks, will show bubbles.
Odinson Posted January 13, 2016 Posted January 13, 2016 When last did you top up the sealant? OP said before christmas. Ben, first step is to get an idea of where the air is escaping from. I'd personally check the sealant level/quality and then refit the tyre and look for the leak.
droo Posted January 14, 2016 Posted January 14, 2016 OP said before christmas. Ben, first step is to get an idea of where the air is escaping from. I'd personally check the sealant level/quality and then refit the tyre and look for the leak. My bad, didn't see that... In that case the prime suspect would be rim tape detaching from when the tyre was removed to do the top up, or a gummed up valve core.
s14phoenix Posted January 14, 2016 Posted January 14, 2016 I fill up our wheel barrow with water when I want to check for leaks in our tyres Hell don't tell my wife but I use the bath if all else fails... I just Handy Andy it again... she will never know...
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