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  1. #1
    Retro Dork Keep SA Lame's Avatar
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    What might cause a bike to pull to the right??

    I'm helping to rehab a friend's old MTB before we release it back into the wild, and when I raod it, I found that if I took my hands off the bars, the bike pulls to the right. I tried it a couple of times with the same result.
    Any ideas?? bent frame? bent rim/loose spokes maybe?
    Pure, Dure, Sūre

    (Pure Hard Certain)

  2. #2
    Senior Member chi-james's Avatar
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    are the tires wide? maybe the front tire is not seated properly on the rim? could be that the headset needs adjustment.... or maybe something is bent, hopefully not though

  3. #3
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    Fork bent? If it's a suspension fork, one leg may be compressing more than the other or the slider is bent.

  4. #4
    Senior Member BCRider's Avatar
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    If the road you tried this on is crowned so you were riding on the slope going towards the ditch it would do this as well. Even a little slope will cause that. Try it again but this time ride back on the same side of the road (ie; against the traffic. Hopefully it's a quiet street ) and see if it tries to dive towards the left. Even a strong crosswind can make a bike do this too, so take that into account as well.

    If it's still aiming for the right despite switching directions then it may be the forks as suggested above or it could be that the rear wheel insn't centered in the frame so it makes the front track over to one side or it could be that the frame is bent from some previous crashing and that is forcing the tires to not ride in the same path and make them "tilted" compared to each other.
    Model airplanes are cool too!.....

  5. #5
    Retro Dork Keep SA Lame's Avatar
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    to recap:
    bike has solid forks.
    rear wheel seems to spin OK on the bike.
    tried same experiment with a road bike and the road bike tracked straight for me, but the MTB is like a bad shopping cart.
    Pure, Dure, Sūre

    (Pure Hard Certain)

  6. #6
    I'm Carbon Curious 531phile's Avatar
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    Check the headset. I bet it is pitted. If it is, you will need a new headset.

  7. #7
    I'm Carbon Curious 531phile's Avatar
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    Also, before you take the headset apart. Check to see if it is adjusted properly. Bikes with overtightened headsets will not handle properly. If the headset turned out to be pitted, it is most likely because the headset was over-torqued.

  8. #8
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    Quote Originally Posted by Keep SA Lame View Post
    to recap:
    bike has solid forks.
    rear wheel seems to spin OK on the bike.
    tried same experiment with a road bike and the road bike tracked straight for me, but the MTB is like a bad shopping cart.
    A rigid fork could still be bent
    The rear wheel can spin unobstructed but still not be centered in the frame
    It's something in that particular bike alright.

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  10. #10
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    Quote Originally Posted by 531phile View Post
    Also, before you take the headset apart. Check to see if it is adjusted properly. Bikes with overtightened headsets will not handle properly. If the headset turned out to be pitted, it is most likely because the headset was over-torqued.
    http://www.sheldonbrown.com/brandt/i...-steering.html

  11. #11
    Senior Member snafu21's Avatar
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    Rear wheel not seated properly.
    - every mile of road has two miles of ditch -

  12. #12
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    You need to take the bike for alignment combined with balancing and rotation of the wheels.

  13. #13
    coprolite fietsbob's Avatar
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    Road is usually crowned , higher at the center line, for drainage..

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