I’ve had a pair of 30mm Challenge Strada Bianca tires fitted for perhaps 6 weeks now, but not ridden that much thanks to inclement weather, perhaps 300km max. The front is holding air ok, but the rear just won’t stop leaking through the sidewalls, it was bearable for a while, lasting ~50-60km, but rather than sealing properly is now becoming too soft to ride every 5km, which makes for one hell of a stop-start ride!
Anyone got any tips or tricks for getting a tyre that‘s doing this to seal? The usual top ‘em up some more and go ride, just doesn’t seem to be working. I use Peaty’s Holeshot Biofibre sealant across a dozen or so bikes without issue. I have these inflated to 65psi.
Thx.
by Jumpy-Birthday8446
5 Comments
Take the wheel off the bike and set it on top of a trash can, bucket, etc so the sealant is in constant contact with the sidewalls. Check pressure and rotate it occasionally, flip to the other side, rinse and repeat. This usually does the trick for me when I’ve had this issue.
The same thing is happening to me with a pair of Maxxis Rambler 700×40. They are weeping a bit through the sidewalls—much less than in your photos, but I’m also running almost half the pressure. I set them up tubeless around December 23rd, and today is the first time I’ve noticed this on a very humid day: a few droplets all over the sidewalls of both tires after about 600km without any issues. The tire pressure is within normal parameters. I understand this is normal due to the casing’s porosity, right? It should stop once the sealant does its job, shouldn’t it?
Are you 100% sure you are only losing air through the sidewall?
just ride on them a bit more. The sealant should eventually seal the sidewalls up.
when I first converted my mtb tyres they went flat overnight, now they stay up for weeks and weeks on end.
Personally I rate Stan’s race as better than Peaty’s as far as sealing things goes but even the Peaty’s sealant should work eventually.
Reading online, 65 psi is the upper limit of tubeless for the 30mm tyres like yours. I’d take 10 psi down and see what happens.
>The front is holding air ok, but the rear just won’t stop leaking through the sidewalls
This adds up because the rear wheel is what takes the majority of your weight.
switch to orange seal, it’s thicker than Stans/bontrager etc due to its higher latex content – great for any supple tires that wont seal up with stans