Tyre problem: Permeable tyre?

Need advice. I recall there's a tyre expert or two around...

I have run a tubeless conversion kit for a couple of years and it has been great - completely reliable. I use Joe's No Flats (Tippex) and I have never been stranded.

Well I damaged a rear tyre last week and got a replacement. I got a Panaracer Fire X Pro 2.1 (from Duffs in Donaghmeade, 20% less than Wiggle price take note). It took about an hour to get the initial seal, even using a large compressor. Then I heard slight hissing, it turned out to be air slowly leaking out all around the sidewalls (not the bead)!. This tyre is air-permeable. I had about 120mL of sealant in the tyre..


My understanding is that the tubeless conversion kit allows you to use ANY normal tyre without a tube.

The original tyres that served me well are WTB dna RAPTOR 2.14.

Duh, am I missing something here?

Thanks,
Greg.

I used the same tyres and the same thing happened, the bead sealed but there was a mist of air+sealant coming out the sidewalls. Just kept shaking the sealant around the tyre and it eventually sealed, think i put in about three scoops of the sealant in the tyre.
They lasted for a good while in the end before the sidewalls gave way.

Greg

I've tried numerous tyre's over the last year or so to see if they'd seat / seal on ZTR rims.. all non ust standard tyres... some were difficult to seal, some were very easy..

Panaracers were one of the worst & I could not get to them to seal no matter what... I had twice the amount of sealant in them and still would not seal.. it was the most porous tyre I ever came across.. air leaking everywhere...

My advice is stay away from Panaracer non UST tyres if you want to run them tubeless..

I never had this porous, air leaking from everywhere issue with any other tyre I've tried.. only Panaracer..

I encountered that once and found after a couple of spins the sidewalls sealed, the goo eventually sealing the tyre. Did look freaky at first though with goo oozing out of the tyre. Bear in mind that tubeless tyres are simply normal tyres that have a thin layer of rubber inside the tyre to make them non porous.

had the same issues with regular panaracers - nightmare to inflate, won't stay up.

however (by pure chance) i discovered that the Panaracer 'PR' (Puncture Resistant) tyre can be set up tubeless without any of the porosity issues of the normal panaracer tyres. I guess its because the carcass is reinforced for puncture resistance and hence less porous.

I have run this one tubeless on a mavic 317 rim with a stans rim strip with no problem:

http://www.wiggle.co.uk/panaracer-tr...ain-bike-tyre/

The real question here is Panaracers? I think they are making them pre punctured now to save you the hassle.

Personally, I'd just steer clear of them in future for tubeless conversions... they don't leave me with much confidence.. and the choice or rubber out there means there will always be an alternative..

Thanks Aidan, Mac, Don, Boom for your input. That is great info that just isn't available anywhere else.

I went back and tried the Panaracer again in tubeless setup......put €10 worth of sealant into the tyre but I couldn't get it to keep pressure. Last night to get on the trail I took out the tubeless kit, stuck in a tube with sealant....then puncture on the way home D'oh!...come back tubeless all is forgiven.

Now, the big question...what tyre to get? I don't care about tyre weight, etc, I just want a reliable setup of tubeless conversion + sealant + tyre for general XC use, plus some road miles on tarmac getting there and back. Will I order more of these:

http://www.chainreactioncycles.com/M...?ModelID=47762

or can you recommend a better alternstive?

Thanks,
Greg.

If you want reliable then UST Ignitors are hard to beat, will tolerate some road and are great all year round.

I'm a convert now too.

I was a bit wary of the Ignitors as I'd always used a softer tyre compound but I've had a 2.1 Ignitor on the back for the last month or two and I love it.
With the Rocket Ron I think it was more the rubber compound that was gripping and then when it reached its limits it would slip in a sudden way. With the Ignitors it seems to be more the thread shape thats gripping and when it slips its usually not as sudden and it inspires more confidence.