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So I have finally bit the bullet to give this a go after completely cocking it up a few years back and ending up with sealant everywhere.
So front wheel went up fine. Looks good, back wheel massive pain to get the bead to seal but managed it. But, seems there is a whole in the tread which isn't sealing, it doesn't appear too big and sealant is bubbling out, I've had the sealant for a while so is it that it might have gone off? Or should I bung more sealant in as it's a 29 2.25 tyre? Used 2oz 59ml bottle per tyre
It'll seal eventually, put some more in once it hold pressure.
Did you shake up the sealant? If it's been sitting a while the crystals which help sealing may have sunk to the bottom..
Sometimes putting your finger over the hole is enough to make it seal.
Yep gave the pot a good shake. It seems to be okay now though I can still hear air getting out somewhere, sounds like at the valve.
"hole"
Did you shake up the sealant? If it's been sitting a while the crystals which help sealing may have sunk to the bottom..
He put a whole 2oz bottle in so that won't be the issue .
2oz doesn't sound like enough sealant for a 2.25 29er tyre , I usually use 2 of the red Stans bottle tops per tyre which probably equares to 4oz per tyre .
Neil +1
It used to be that 60ml of spooge was good for a tubeless 26" tyre. Given the extra volume of the 29er, you ought to think about putting 100-120ml for a first time inflation, especially if its a lossy tyre.
Yep gave the pot a good shake. It seems to be okay now though I can still hear air getting out somewhere, sounds like at the valve."hole"
What rim strip/tape you used? Sounds like that's your problem as leaks by the valve usually emanate from elsewhere and find their way to the easiest exit point.
Might be worth a layer of leccy tape to help it.
Ramsey Neil - MemberHe put a whole 2oz bottle in so that won't be the issue .
You still want to properly shake it up, otherwise bits can be left in the bottle.
I'll see if they are still inflated in the morning and then probably add anohter bottles worth.
I used yellow stans tape, I'm wondering if maybe it is around the valve. Don't really want to take the whole thing off and out another layer on if I can as it is more faff. Surely the sealent will find the leak wherever it is a plug it eventually?
Had similar on my rear, I put 2 x 2 Oz bottles in, shook it hard and then laid it flat for 10 minutes each side.
Don't think there's any substitute for riding tbh, you can spend ages shoogling but even a 2 minute ride does better.
(also, I may have once punched myself really hard in the mouth while shaking a wheel around, never again.)
Northwind, I smacked myself in the forehead with a flow ex 🙂
Well by jingo, they are still inflated!
Now I have a dilemma is there enough in there to seal if I get a hole on the trail?
Secondly what tyre pressures do you guys run? I've been having to run around 50psi to try to avoid pinches, and was still pinching.... I don't want them to be too draggy though, around 35psi? 85kg kitted up on a scale.
[i] is there enough in there to seal if I get a hole on the trail?[/i]
if you can hear it sloshing when you shake the wheel there's enough.
[i] I've been having to run around 50psi [/i]
😯
50? I didn't run much more than that on my cross bike!
Start at 30 and work down from there.
Yes 50 and still pinch at trail centres pretty much every proper descent. Kept increasing to try and stop it went from 2.1 normal tyres to 2.25 snakeskin but still happens at afan, hence giving up and trying tubeless. Off to Cwmcarn tomorrow and fingers crossed I won't be pinching yet again
cough..tubes..cough
[i]still pinch at trail centres pretty much every proper descent.[/i]
I think it's either your tyre/rim/tube combo or technique that's the issue.
There's 1000's of people riding trail centres and there's no way they're all running those sorts of pressures when they're your weight.
I think 50psi is more than Stans warrant/recommend their rims to be run at, for example.
You must really struggle for mechanical grip too, I imagine?
Tubes? That was with tubes?
Was 2.1 Ron's on whatever the stock wheels were and now light bicycle carbon rims. Now 2.25 snakeskin nic and Ralph on LB. 2 pinches in 3 descents at afan. Technic maybe it sucks having to back off because tyres aren't up to it, and I see plenty of faster guys on the same rubber. The last rear pinch was landing one of drops on blade, not sure what you could do different, other than not do the drop. Anyways I'm looking forward to trying tubeless now.
Never found grip that much of an issue, maybe because I've moved from a 26er anthem and the scale has boatloads of traction.
I'm closer to 100kg in full ride gear and I run mine at 22fr and 24rr
25-30psi depending on what I'm riding.
If you are taking that 50psi reading from a track pump, I doubt it is accurate. A digital one is needed in my experience, however, those tubeless valves get all gunked up making accurate readings difficult anyway. But yeah, 13st here and run low 20's.
I'm a fatty and set both front and rear at 30psi on the track pump, runs brilliant, loads of grip and no issues...... Yet.
Well first proper off-road use at Cwmcarn. No punctures, and I did notice the fact I had more grip than I,m used to. I'm a convert!
🙂
What pressure were you running?
I weigh 100kg;
about 30psi for xc sorts of tyres (intense system 4)
about 25psi for heavy double ply (dh 909s)
used to use 35-40psi with tubes
You must really struggle for mechanical grip too, I imagine?
But fine on aerodynamic grip? 😉
Thing is... Tubeless is hard to pinch (it is possible) but, the impacts that would have pinchflatted you are still there, so if you end up running lower pressures than you used to it could be hard on your rims...
But as above, am skeptic of your pump, it takes effort to pinchflat at 50psi even if you're riding into sharp edges etc but a drop onto anything but a pile of rocks really shouldn't do it. Your tyres are fairly puncturey mind- ime snakeskin schwalbes are still about as tough as sausage skins- but it shouldn't be that.
Schwables are very easy to pinch I find, and have to be run fairly hard. Too hard to get grip, I gave up with them and ran heavier tyres. I'm less than 60kgs and nimble as well, so not a heavy person. The quality of inner tubes makes a big difference though.
One of the best things about tubeless is that you can run sensible pressures on tyres with pliable thin tyre walls and thus getting good grip.
There is no way I would go back to tubes.
I was running an indicated 30psi (same pump as the 50psi). Think i could go less. It did however feel more draggy on fireroad sections and my times are slightly slower. I am worried about the rims i posted a thread sometime ago about tubeless and rim damage but there seemed very few concerns.