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Need Help with brakes

Discussion in 'Beginners' started by Chappy, 19 May 2008.

  1. Chappy

    Chappy Über Member

    Location:
    Portland
    Hi everyone I am still quite new to this so as the title says I need some help with my rear V-brakes :rolleyes: as you can see by the pictures the are lent over to the left and not straight so they keep rubbing on the rim. Excuse the naff pictures camera is not very good, as you can see the left brake is rubbing but the right side is no where near the rim. Has anyone got any ideas how to correct this.


    Cheers

    Chappy
     
  2. walker

    walker New Member

    Location:
    Bromley, Kent
    As I've not used Canti's for years, can you not just push it over to realign it? or is it stuck in this position?
     
  3. gwhite

    gwhite Über Member

    Location:
    Auchtermuchty Fife
    First you should make sure that your wheel is central in the forks. Do this by undoing the Quick Release or Hub nuts and with your weight on the handlebars secure the wheel.
    If the brakes are still off-centre then this may be remedied by screwing in the small screw seen in your photo. This should be done on the brake having the block closest to the rim. As you screw in, the block should move away from the rim. You may have to adjust the opposing screw following this to have both blocks equidistant from the rim.

    It is possible of course that one of the return springs on the callipers has weakened but I'd try the adjustment above first.
     
  4. Chappy

    Chappy Über Member

    Location:
    Portland
    I have had a quick fiddle with the screws and kind of fixed it although its still leaning over
     
  5. Chappy

    Chappy Über Member

    Location:
    Portland
    I am just wondering if it would help replacing the brake arms.
     
  6. Mister Paul

    Mister Paul Honky

    Location:
    North Somerset
    remember that screwing in the screw on one side has the same effect as screwing out the screw on the other.

    If this problem is a result of you taking the wheel out then the chances are that you've not put it back in straight. This shouldn't happen for no reason.
     
  7. Chappy

    Chappy Über Member

    Location:
    Portland
    Thanks for all the help guys I have just tested the and it seems that right brake arm dosnt return to its original poistion so i'm going to to assume that the spring has gone.
     
  8. Mister Paul

    Mister Paul Honky

    Location:
    North Somerset
    The spring might just have slipped out. See how it looks compared to the other side.
     
  9. Your wheel is not in right! undo the QR or the bolts on the back wheel move the wheel over to the right. If you look at the bike from the back your tyre should be in the middle of the frame. When it is do the QR or the bolts back up then see how the brakes are looking.
     
  10. summerdays

    summerdays Cycling in the sun Staff Member

    Location:
    Bristol
    Having had a spring that has gone (twice), you should be able to see the crack in the spring before it goes fully. If it hasn't gone, you should be able to use the screws to change the tension.
     
  11. k-dog

    k-dog New Member

    The springs can often just get slack for some reason.

    If you have the screws all the way in but the arms aren't out far enough then you just need to unclip the spring from behind the arm and then bend it a little more. You ideally want to have the screws half in so there's a little adjustment either way so just keep bending the spring carefully until it does that.

    Making the brake nice and central with the springs well tensioned will make your brakes work beautifully.
     
  12. Chappy

    Chappy Über Member

    Location:
    Portland
    Ok it isnt springs underneath the brake arms but long bits of wire I have screwed in the screws on both sides and this seemed to help a bit.
     
  13. Chappy

    Chappy Über Member

    Location:
    Portland
    I have some other brake arms which are the same I will try them see if it makes a difference.
     
  14. k-dog

    k-dog New Member

    Those long bits of wire are the springs - they're about 1.5mm thick and attach near the pivot of the brake.

    If the screws made a little difference then just bending the springs a little will do the trick - the screws are just at the limit of their adjustability.

    Replacing the arms might work - because those springs might just be more bent - but it would be about 30 seconds work adjusting the ones that are already on.
     
  15. Chappy

    Chappy Über Member

    Location:
    Portland
    Ok ill try it cheers. :blush: