Sealant without removing Valve Core ?

RichyK

Hi Guys ive just bought a new Specialized Stumpjumper
only problem is its the first time i have had Tubeless tyres on a bike
Ive read up on them and worked out that using sealant on them virtualy
wipes out being stranded on a trail with a flat tyre !
So i ordered some Stans tyre sealant which reviewed very highly
problem i have is i have Presta Valves on my rims and you are unable to remove the core from them
So how do i apply the sealant to the tyres ?
do i have to pop the tyres off the rims and squirt in the sealant this way ?
any advise would be greatly apreciated

cheers
Rich

monster-mash

Stans web site has video guides

Watch the appropiate one for you, mine were stans rims so with the rim tape on after seating the tyre removed the one side of tyre poured in recommended amount tyre on and hey presto.

RichyK

Just watched the videos and thanks for the advice i just wasnt sure if i removed the tyre
from the rim with a lever wether or not i would disturb something (having not used tubeless before) that would prevent the tyre being inflated again

cavegiant

There is a bit of a knack to tubeless, it is a skill, so do not expect to get it right first few goes.

It took a couple of hours to mount my first tyre, now it only takes a few minutes.

Also another key thing with tubeless is bring a spare tube with you.
It fails so rarely that I tend to get lazy packing one. Then once every few years you are stuck with a long walk. The other key thing is not to forget how much easier to puncture tubes are. More than once I have stuck in a tube only to pinch flat 10m later.

50 times more reliable, but not puncture proof.

davewalsh

Firstly, What rims do you have and are you currently running tubes or tubeless ?

If you're running UST tubeless, you'll have to pop off the bead on one side and add the sealant directly into the tyre, then re-mount the tyre, put plenty of soapy water on the bead and re-inflate.

If you're running tubes at the moment then the tube needs removing, taking the valve with it. What you fit next depends on the rim. For UST rims you need any UST valve, for Stans rims you need some Stans yellow tape & Stans olympic valve. For non-tubeless rims you need the Stans rim strip in the right size for your rim.

Then it's just a case of following the instruction video's on the Stans website.

RichyK

Ive just rang the shop i bought the bike from and have been told although the bike has tubeless tyres on( specialized The captain 2 bliss on the back and Purgatory 2 bliss on the front) they actually have tubes in them !
i feel a bit stupid now! :oops:
but having watched the videos of Stans sealant on Youtube and being very impressed the fact i have some sealant ordered and on its way to me that i will actually try to set them up tubeless my rims are specialized dt swiss 420 sl 's
obviously i will need to order some stans rim strips
has anyone else gone tubeless using these tyres/rims ?
Any Problems ?

davewalsh

I've tried to convert my rear tyre with a rim strip (Mavic XM719 with Panaracer Fire XC Pro) and failed miserably, had trouble with the tyre burping air through the bead, however don't let thar put you off as Panaracers are not recommended for converting because they have quite loose beads.

I've run a Maxxis Minion & Stans Flow rim on the front for 3 months now without problems. I'm going to try the back again with an Ardent. As your tyres are tubeless, hopefully you shouldn't have a problem.

jairaj

If you have DT Swiss rims then use their rim strips, they will probably be a better match than a generic Stans rim strip.

I've used Specialized 2bliss tyres on UST rims and Stans Rims with yellow tape. Both were very easy to set-up and get working reliably.

mattv

I am just doing exactly this on my new Epic this afternoon. Got dt rims, some yellow stans tape and 2 2oz bottles of latex. Anything particular to watch out for? Thanks!

jairaj

ermm Im not sure how well that is going to work. AFAIK the yellow tape only works on stans rims which have a special bead hook a bit like UST rims to help seal the bead. Otherwise you need the rubber strip.

Not saying it won't work, because it might but, you might be huffing and puffing a lot to get the tyre to seal.

mattv

This is a sticky tape, and is going on tubeless ready rims? In theory it is just to block the spoke nipple holes, right?

jairaj

I've never used DT rims so can't say for definite but, from the look of the DT swiss tubeless converter kits they use a rubber rim strip specially moulded to fit the shape of their rims better than a generic rim strip from the likes of Joes or Stans.

But as I said Im not an expert on DT rims so I maybe completely wrong. Give it a try and see what happens you're not going damage anything from trying, worst case is you get hot and sweaty from pumping away and no sealing on the tyre.

mattv

Tyre won't seal.... Could be because I am using a small pump though. Will keep trying, else I might walk to Halfords for a track pump!

jairaj

oh you will definitely need a track pump :!:

mattv

Damned thing just won't seal. With a track pump it won't get the bead of the tyre into the rim. Any ideas?

nathanst170

if you have the adapter for the valve pop down to your local inderpendant car tyre retailer
or if you know someone with a compressor normally will cost a small fee or a packet of biscuits and get them to inflate the tyre some times it can be a bit of a pig but this option makes life easy

twonks

mattv wrote:

Tyre won't seal.... Could be because I am using a small pump though. Will keep trying, else I might walk to Halfords for a track pump!

After a few bad tries with Co2 adaptors, I realised that a good way to get the tyre inflated is to make sure it is not touching the floor anywhere. This deforms the tyre and prevents it going up.

Now I have perfected a system which suspends the wheel in the air with no contact points on the floor.

Using this method and a rapid pumping action with a half decent floor pump and my tyres hold air within 20 seconds or so of pumping.

Certainly needs a good volume per stroke that a track pump gives, or a Co2 cartidge.

Personally I don't use cartridges any more, unless for emergencies out on the trail.