Tyre problem

[TiBones]

Some advice please! I run a Conti Race King 2.2 29 inch on a bontrager rythm rim. Despite numerous attempts, I cannot get the tyre to seat properly. It seems as if the bead gets a bit stuck in the spoke bed and won't hook under the lip as it is supposed to. I have tried:

Pumping to about 6 bar, in the hope that it "pops" into place

Using a CO2 bomb for a really quick inflation

Turning the rimstrip around as it seems to run off to one side a bit and had taken on the shape of the spokebed

tyre on and off the rim at least 10 times

 

Unfortunately, apart from a really bumpy ride at 40 kph on the tar, it has damaged the tyre a bit just above the bead.

 

Am I doing something wrong, or is there an obvious solution that I am missing?

[Top Fuel]

Try using a very soapy solution on the tyre. Just like they do with cars. It might give it the lube it needs to seat properly. It worked once for me when I had a slight seating issue. Used 3 teaspoons sunlight and 1 teaspoon water. I am not sure if it will work always though..

Edited November 30, 2010 by Top Fuel

[TiBones]

Cool! Will try this arvie - Thanks Bud!

[Cassie]

Maybe a dud tyre?

check the tyre for inconsistencies in the bead manufacture...

[29er]

I run the same rims...you need the BONDRAGER plastic liner that fits inside the rim.

The problem now is that there is no stock for the 29er Rhythm rims...so I was told by Cycle Lab.

They supplied me with the wrong liners....they only got for the 29er Race lite rims and they to narrow.

[TNOSE_E]

Now that you mention the race king problem. I have a similar issue. Trying to put a brand new Race king on XT Tubless Rim. The thing battles to seat and after I get it to seat it looses pressure over a few hours. Went for a ride and starts loosing pressure after about 40min slowly. I have tried putting it in water to find the leak but nothing. Checked the valve, added more sealant. I have basically given up with this specific tyre. Have put the old Race king back on and no problems.

 

 

This is crazy! I have done enought tyre changes and getto setups by now to know the pit falls. Have even done tubless on wire bead tyres.

 

 

I am wondering if there is no defect / deformation with the bead or something.

[TiBones]

Don't think so! Had a similar problem with a Bontrager Jones tyre, eventually did enough damage to the area above the bead that the tyre blew at the bead..... so I bought a Conti Race King.......

[Headshot]

race kings are great tyres but are built more like tube tyres - ie not very beefy with soft sidewalls and a loose fit on the rim - they are light as a result. I had all sorts of grief fitting them to my XT wheels - sometimes they'd pump easily other times not. They did retain air tho.

 

In comparison Maxxis ust tyres are a tight fit and pump up as if theres a tube in them. So, on your non ust rims, you have an even bigger battle with the RK's and I would imagine them being 29" does not help either. Try a Maxxis UST tyre and see if that sorts the problem.

[El Saltemontes]

Its the rim tape, the bontrager rythms need either special tape or the hard plastic type which has the form of the rim. i had the same problem and I took them to eagle canyon cycles and they fixed them up in no time, sinse then no problems, I do find the offset spokes make the valve seating look a bit strange.

ggod luck

[TiBones]

Thanks to all. I now have a new Bontrager rimstrip and a bottle of dishwashing liquid. Zat tyre vil go on ja?

[TiBones]

Report back - after lotsa soap and a new rimstrip, and re pumping to about 4.8 bar, there was a helluva load "pop" as the tyre seated itself properly. Let the pressure back down to 2.8 and ... no more wobble.

Thanks Guys for your help.