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  1. #1
    Senior Member Smallguy's Avatar
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    Apr 2008
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    any 200 lb + riders using tubeless


    I recently switched my tires from Bontrager Jones XR tubeless ready (was running tubes with them as they were stock on my bike Trek fuel ex9). I switched to panracer cinders since allot of guys here run them and find they work well on our terrain.

    anyway if these do not work for me I might try tubeless but I'm currently 205 and I'm wondering if running lower tire pressure will result in me damaging my rims since I'm a heavier guy. I usually run around 40 psi in my tires

    I should add the terrain here is pretty technical with allot of rocks and roots and I ride all mountain and will be racing a bit of XC and enduro XC this year.

    anyone have much experience?

    is tubeless a waste unless you can get away with low tire pressure?

  2. #2
    Rat Bastard mcoomer's Avatar
    Join Date
    Jul 2006
    Sammamish, WA
    My Bikes
    Cannondale Prophet, Specialized S-Works SL2, Specialized S-Works Stumpjumper
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    I'm heavier than you and I've run tubeless down to just under 30 psi but normally I run closer to 35. Once I rolled my front tire over a bit and burped some air but that's about it. I just stopped at the next intersection and topped it off and was good to go. I think you'll be fine.

    It's better to burn out than fade away...or slip out of your pedal and face plant on the side of the road!!!

    '06 Cannondale Prophet
    '08 Specialized S-Works Stumpjumper
    '09 Specialized S-Works Tarmac SL2

  3. #3
    gbg is offline
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    Jan 2009
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    I was running Mavic 823 rims on XTR hubs when I was up to 275lbs. I never had a problem with my Kenda Kenetic 2.2 inch knobs. I would usually run them at around 40-45psi, but when I got lazy and didn't top them up every few days I am sure I was down to the 30's (didn't use sealant). Since I wanted a little more speed I got some Maxxis wormdrives (semi slick) and would pump them up to 50+. Once I pumped to 55psi in a 70 degree air conditioned room and took them out into 95+ heat. After hammering up and down some pretty steep but short climbs I was descending at about 25 and heard a whap,whap,whap just before a very LOUD BOOOOM.
    I would strongly suggest not go OVER the Max psi, but I think they do fine at lower. And sounds like that is what you want for the maximum deformation of the tire to grip the roots without worrying about pinch flats.

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