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Devon TRF Group Open Forum -> General Discussion Board -> Valve stem seals
Post Info TOPIC: Valve stem seals
TTR


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Valve stem seals
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First off make sure you have some good tyre clamps (rim locks)  and that your inner tube is inflated to a sufficient pressure to "grip" the tyre. If it doesn't then there is nothing to stop it rotating inside the tyre every time you brake or accelerate. When you have the tyre off put your new tube inside and see what pressure is needed for it to fill the tyre.

Sorry for blatant advertising but you did ask - see here for the seals http://www.totallyttrs.com/#Tyre_Air_Valve_Seals

The rim lock can also be a source of water ingress and there are shaped washers and nuts to help prevent that - see http://www.ttr250.com/TTR_extras/#rim_locks and look below the rim locks.

TTR



-- Edited by TTR on Monday 25th of November 2013 09:59:48 AM

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wackyracer


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Had the same little problem on me mates bike yesterday, replaced the tube after finding a small nail in the tyre then to his amazement I chucked the little locking nut over the hedge whilst at the same time saying you won't be needing that winkbiggrin



-- Edited by wackyracer on Monday 25th of November 2013 03:07:35 PM

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devondan


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I'd keep that nut !! - often needed to hold the valve in place when changing a tyre to stop the valve disappearing back into the tyre - especially with Ultra heavy duty tubes!



-- Edited by devondan on Monday 25th of November 2013 05:20:06 PM

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Simon D


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Ripped valve out of rear tube yesterday. To prevent this happening again I was told that I should run without the nut on the bottom of the valve. If I do this all the water and ****e will end up leaking in around the bottom of the valve. Anyone know where I can buy those rubber seals that fit around the base of the stem?



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RichT4


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TTR wrote:

 When you have the tyre off put your new tube inside and see what pressure is needed for it to fill the tyre.

I tried this recently, with a normal HD and noted that 6 psi was needed before the tube could no longer slip around in an MT43 tyre. Once fitted on the rim it would take even more pressure to fill the rim channel and start to exert any real force against the weight of the bike.



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Simon D


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Cheers for your help, will order some.



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RichT4


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that's called "Fly Tipping" wacky, unless you through it into your own garden.biggrin



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wackyracer


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RichT4 wrote:

that's called "Fly Tipping" wacky, unless you through it into your own garden.biggrin

 I was in East devon its all my back garden biggrinbiggrinbiggrin



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Pete


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devondan wrote:

I'd keep that nut !! - often needed to hold the valve in place when changing a tyre to stop the valve disappearing back into the tyre - especially with Ultra heavy duty tubes!



-- Edited by devondan on Monday 25th of November 2013 05:20:06 PM

 + 1

Also the nut is handy to lock against the valve stem cap to prevent it coming off.



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