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  1. #1
    mtbr member
    Join Date
    Apr 2017

    Is there a name for this yet?

    Does the following happen to any of you? If so, do you or your bike community have a name for it?

    When heading down a rocky trail, at speed, the front tire hits a rock and instead of glancing AWAY from the rock as a non-plus tire would, the tire wraps around the rock and shoots the front wheel TOWARD the rock.

    I've been calling this phenomenon "tire wrap." I am not sure exactly what causes it, but I think the tire carcass is so large and under such low pressure that the tire deforms and creates a new contact patch that has enough traction to pull the wheel to the inside. In contrast, a low volume tire with high pressure can only bounce off an object under the same circumstances; speed, obstacle shape, angle of attack, etc.

    Hopefully, someone else has experienced this too and I'm not going crazy because I'm spending to much time riding my rigid single speed.

  2. #2
    mtbr member
    Reputation: Velobike's Avatar
    Join Date
    Jun 2007
    Quote Originally Posted by jay2klbs View Post
    ..I've been calling this phenomenon "tire wrap." ...
    I call it steam rolling.

    The wheel doesn't care where you point, it just goes there just like a steam roller..
    As little bike as possible, as silent as possible.
    Latitude: 5736' Highlands, Scotland

  3. #3
    All fat, all the time.
    Reputation: Shark's Avatar
    Join Date
    Feb 2006
    Monster truck effect.
    Downhill lazy boy riding.

  4. #4
    This place needs an enema
    Reputation: mikesee's Avatar
    Join Date
    Aug 2003
    Preload the bike before that rock, then *just* as the tire hits it have your weight going up instead of forward. The result is what I call 'splatting' -- using the rock to kick the front wheel, and then the rest of the bike, into the air.

    Link a bunch of these together back-to-back-to-back and you can have a damn good time motoring along a rocky trail.

    More fun to go over stuff than around or through it...

  5. #5
    since 4/10/2009
    Reputation: Harold's Avatar
    Join Date
    Dec 2003
    it's a similar sort of thing when you're riding in deeper snow on a narrow track that's packed, but you at least occasionally brush against the unpacked snow at the edge, and pulls you even more off the packed surface. I don't have a specific word for it, but it is a thing.

    Rocks in my area tend to be slippery, so I don't generally get the same effect on them. The tire tends to slide right off if I brush against it. Even if my intent is to ride over them, if they're a little bit angled compared to my approach, my tires will often slide off. Dry, wet, doesn't matter much.

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