Tubeless

Chunkyone

I've not had these before so bear with me. I understand that you should install the sealant for puncture protection but should the tyre keep pressure without it. My front tyre will go flat within about 2 hours (quicker if riding on it)?
Thanks

deveng

Pump it up and spray water with washing up liquid in it on to the tyre to find where the air is escaping from. Could be that the tyre is punctured.

Chunkyone

Ok thanks
I will try that although the tyre is brand new so not punctured but the air is going somewhere!

davewalsh

UST tyres on UST rims will hold air without sealant. For any other combination you will need the sealant to seal the microscopic holes in the tyre sidewall.

njee20

^^^ This

Non-UST tyres (like most frankly) are not designed to hold air without sealant.

Chunkyone

I'm running a Mavic TN719 rim and have a new Specialzed Purgatory Control tyre. The rear came to me with a tyre already fitted and this keeps air and so I assume that this have sealant in it?

njee20

They're not UST, so don't have to work without sealant. That's not to say they will definitely need sealant, just that they may, so perhaps your front is a bit more porous.

That said... it's a braver man than I who sets up a tubeless ready tyre without sealant.

Chunkyone

Ok. I am new to the tubeless thing trying to embrace modern technology. I have some sealant coming (Stans) and so will try that. I already have the rims strips in place and so is it straight forward to put the sealant in? Any tips?
Thanks

njee20

Are you able to pour from a bottle into a vessel? That's the technique ;-)

I use about 1.5 of the red scoops on a new tyre.

mrmonkfinger

njee20

Must say I had one of the sealant injectors, and it really made chuff all difference! Pop a bit of bead off the rim, pour sealant, re-fit tyre. The injector makes it hard to tell what's in there, if it's dry etc.

Chunkyone

I've got a bottle like this
http://www.ebay.co.uk/itm/150844746788? ... 331wt_1271
Is this likely to be enough?

njee20

That's for one tyre yep, just stick the whole lot in.

Buying a quart is far better value in the long run.

Chunkyone

Nice one thanks.
Do I put in the valve and shake the wheel around to get the coverage or do I pull a bit of the tyre off the rim and put it in that way?

allthegearnoidea

yup as njee said, pour it all in, if youve got a valve key (if not one of the holes on a spoke key fits nicely) then with the tyre seated pop the core out and pour in, then core back in and pump up, you may find if its a poor seal ont he rim as some tyres are that a fair bit of the sealant is used to seal it up on the rim, but since you have the bottle now you can get the larger stans bottles and decant!!
my front tyre (hutchinson tubeless on american classic rims) Rarely looses air, infact has had half a bottle of hutchinson sealant since fitted 18 months ago, the rear (same set up but non tubeless version) uses a little more but its only run at 35psi where as with tubes i was on 50+ to stop pinches!!

the little bottles of stans are normally £3 in the shops, £4 inc postage on ebay, great for having in the trail bag!! but a bigger bottle is only something like £13 for 473ml!

mrmonkfinger

njee20 wrote:

Must say I had one of the sealant injectors, and it really made chuff all difference! Pop a bit of bead off the rim, pour sealant, re-fit tyre. The injector makes it hard to tell what's in there, if it's dry etc.

They're not necessary by any means. But, syringes are about 4 for £1 on fleabay... I just found it a bit easier to get the tyre mounted first, and then squirt it all in through the valve (core still out after mounting).


The jumbo bottles of sealant are much much better value.

Anonymous

Was confused myself on what to get. About to order some sealant but then see all the stuff on 'kit' you supposedly need to remove cores, special valves, cores, etc.

Got CB Iodine tubeless rims so no conversion required there, and I'm going to use my existing single-ply Maxxis Minion & High Rollers which I know from others using them they work fine tubeless.

So just need sealant. Like this? http://www.nextdaytyres.com/Tubes/Stans ... spx?ID=367

And none of this stuff required? - http://www.nextdaytyres.com/Tubes/Stans ... ories.aspx

When you say buy a quart is fine, how much would you use per tyre?

And for valves, have been advised I can DIY it with valves off old tubes.

Makes sense to me to not faff around injecting via the valve. Added to that, witnessed one of our guys having hassles with his removable core bit popping out when taking the dust cap off to pump the tyre!

njee20

You don't need any sort of valve removal tools, I never take my valves apart, so yes you can just cut valves off tubes if you want.

A quart is 987ml (IIRC), you need 60-100ml in a tyre, so it'll do about 10-15 tyres, assuming you pour sealant away every time, personally I transfer what I can between tyres.

Anonymous

Cool. That's me sorted then I think. Not often I'm swapping tyres about anyway.

cooldad

You will need to when they roll off the rims and give us all a laugh.

Anonymous

All adds to the fun of our rides. Bad omens perhaps that I'd decided pretty much to go with it and then this weekend there were three 'technicals' involving tubeless.