South Wales Trail Riders

    trials tyre tube size

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    Mogs

    Posts : 876
    Join date : 2011-02-24

    trials tyre tube size

    Post by Mogs on Fri Apr 29, 2011 10:12 pm

    put a part worn michelin trials bike tyre on a old set of rims i use when doing alot of road work, pumped it up.. had to take it to about 40psi before it was anywer near hard enough to ride with... high i know...rode with it.. all good.. then went flat a little later Sad

    i used a heavy duty michelin tube... the same as i would put in my s12?

    am i missing the point.. do i need to put some bigger type trials tube in or anything? or is this normal tube okay? no idea what trials bikes use.
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    captain caveman

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    Join date : 2010-01-26
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    Re: trials tyre tube size

    Post by captain caveman on Fri Apr 29, 2011 10:38 pm

    Would think your going to need to put a lot of air into it to get it up/hard
    (that sounds all wrong Shocked )
    If you look at a trials bike they run very low tyre pressures they don't travel at speed and weigh a lot less than an enduro bike..... Im not making much sense here am i scratch
    Its a bigger tyre so needs more air Laughing
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    Mogs

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    Join date : 2011-02-24

    Re: trials tyre tube size

    Post by Mogs on Sat Apr 30, 2011 2:10 am

    ye, i guessed that..had to put loads of pumping in to get any sort of hardness, Twisted Evil

    but before i fix the tube.. i wanted to check i wasnt doing something wrong.. like putting in some sort of trials tyre tube rather than standard, and having the same problem again.

    may just shuv a normal tyre on rather than this, it seems to much hassle trying to maintain a hard one all the time, bloody rubbers :bounce:
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    shocker

    Posts : 3145
    Join date : 2010-07-21
    Age : 59
    Location : in exile just over the border

    Re: trials tyre tube size

    Post by shocker on Sat Apr 30, 2011 5:48 pm

    No expert on trials tyres, but i do know of a bloke who wanted to use a tubless trials tyre on a conventionl rim, and then having to convert it to a tubless rim before it worked.
    The one on my trials bike is tubeless and uses a rubber band thing with a valve bonded into it to seal the spoke holes. It also runs at only 4 to 6 psi on a bike weighing less than 70 kg.

    I've used Pirelli MT 43's on a trail bike with normal tubes at 10 to 15 psi with no problem's but i think the sticky tubeless one's (Michelin x11 etc) are more tricky.
    If it is a sticky one it won't last long either (seen one knackered in a day on a 400 endruo bike!) and it'll squirm around like buggery on the road too.

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