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Thread: pinch flats

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    pinch flats

    hey all. I've been a mountainbiker for a while and I've always had a problem with pinch flats. I ride pretty rocky terrain (new england trails) and I ride about 40 psi. What can I do to prevent this? I've spent a fortune on tubes. Thanks.

    Sam

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    Wood Licker Maelstrom's Avatar
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    How big are your tires? Do you run thickersidewalls or try to save weight with thin ones?

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    snow DjRider04's Avatar
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    Run thicker tubes

    Switch to tubeless (Stans)

    Get larger sidewalled tires

    Your pressure should be fine.....

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    BloomBikeShop.com BloomBikeShop's Avatar
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    I know all about rocky New England trails. I'm an xc racer and one thing I do is run my tires at 50 psi to ward off pinch flats. It's not the best for traction, but it's not usually a problem unless it's wet.

    One easy (and cheap) thing you can do is coat your tubes and inside of your tires with baby powder. It keeps them from sticking together so the tube is less likely to pinch.

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    Digs technical steeps
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    Quote Originally Posted by ssm4ssm4
    hey all. I've been a mountainbiker for a while and I've always had a problem with pinch flats. I ride pretty rocky terrain (new england trails) and I ride about 40 psi. What can I do to prevent this? I've spent a fortune on tubes. Thanks.

    Sam
    Have you experimented with different tire pressures? My first thought is you might be running a little low. The tip on dusting the insides with baby powder is a good one, too.
    'My other bike is a bike.'

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    Thanks for all the advice. I'll try 50 psi and see what happens. Got to get me some baby powder as well, thanks again.

    sam

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    Hardtail WorldWind's Avatar
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    50 psi is way to hard for trail ridingÖ.

    To stop getting pinch flats you have to get up off your ass and let the tire ride over the terrain. Itís a matter of finesse not tire pressure.

    When we leave the pavement and hit the dirt the pressure gets let out to 36-33 or even lower when itís wet. Go around the rocks and hop the roots, itís a dance you canít do sitting down.

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    Digs technical steeps
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    One consideration is how much you, the rider, weigh.
    'My other bike is a bike.'

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    Hardtail WorldWind's Avatar
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    Itís more about how light you are on your peddles. Even the skinniest grommet that slams his wheel into edges is going to flat.

  10. #10
    Digs technical steeps
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    My riding style is generally out of the saddle and light on the trail. I'm considered pretty nimble when it comes to picking a line. But, at 182#, if I ran my tires at 33-35 lbs I wouldn't have much of a ride; I'd be rimming on every small twig on the path.
    'My other bike is a bike.'

  11. #11
    mmm babaghanouj. rasheed's Avatar
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    Quote Originally Posted by ssm4ssm4
    hey all. I've been a mountainbiker for a while and I've always had a problem with pinch flats. I ride pretty rocky terrain (new england trails) and I ride about 40 psi. What can I do to prevent this? I've spent a fortune on tubes. Thanks.

    Sam
    when i used to run 2.1s on my fluid i used to get pinch flats often - usually from bunny hops where i didn't get my rear wheel high enough over whatever i was jumping (often a high curb or low ledge or something like that). i changed my tires to tioga dh 2.3s and haven't had a pinch flat since.

    given that, my suggestion would be to either run a higher psi, or to get wider tires.
    current ride: 2003 norco vps fluid 3.0 (custom build).



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    hey

    i'm 170, so weight is not a problem. not to brag or anything but i don't sit on my ass during the ride and i'm pretty nimble around rocks. new england is notorious for rocky terrain so i don't think it's my inferior riding skills causing these flats. i'll try the baby powder thing and inflating to 50. i'll give you guys an update. thanks.

    sam

  13. #13
    Digs technical steeps
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    Quote Originally Posted by ssm4ssm4
    hey

    i'm 170, so weight is not a problem. not to brag or anything but i don't sit on my ass during the ride and i'm pretty nimble around rocks. new england is notorious for rocky terrain so i don't think it's my inferior riding skills causing these flats. i'll try the baby powder thing and inflating to 50. i'll give you guys an update. thanks.

    sam

    Please give us a follow-up. There's always a lot of debate reSI's.
    'My other bike is a bike.'

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    Senior Member Jim311's Avatar
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    Anybody who rides hard will get pinch flats. Running a bajillion PSI is a stupid idea.. I'd rather flat than have no traction and have the bike beat the piss out of me. Tubeless tires are better in pinch flat situations, but it's a total misconception that it's impossible to pinch flat a tubeless tire. How do I know? I've pinch flatted 2 tubeless tires, both due to either improper inflation, or just coming down way to hard on an unfortunately placed sharp rock. They usually pinch at the bead and won't hold much if any pressure. I'd say just learn to ride a little more carefully and lightly, or buy some tougher tires and thicker tubes. Running higher PSI is sort of a lame fix to such a problem IMO.
    My money pits:

    Cannondale Jekyll 500 with Avid Mechs and Sun DS2 rims with XT disc hubs.

    Cannondale F900 with SRAM XO shifters/derailler, Mavic X3.1 tubeless wheels, Avid Mechs, Race Face Next LP cranks, Time ATAC pedals, SRAM levers.

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