Front Brake Issue

hairy_boy
hairy_boy Posts: 345
edited August 2013 in Workshop
Hi Guys,

got an issue with the front brake on my Giant Defy 2 I really need some help with.

when I turn my handlebars to turn left then the gear cable pushes the brake cable a little and the brake gets 'swiveled' a little resulting in the right hand side brake pad rubbing on the wheel (when in the bike stand it stops the wheel spinning).

Thought it was a cable routing issue so have made the gear cable outer (which looked a little short/tight) a little longer and it has helped but not eradicated the issue.

Another thought - the front brake calliper sort of 'floats' whereas the rear caliper is very firmly fixed with no right to left float/swivel at all. Should the front brake calliper be firmly fixed (like the back) or is it normal to have right/left swivel present ?

When I did the Wetherby Filey ride recently a dosy pillock fell heavily on my bike resulting in the bars being swivelled round and the front caliper smashing against the down tube of the frame. Wondering it the calliper has been damaged allowing this float/swivel or if it is a cable routing issue ?

Comments

  • diamonddog
    diamonddog Posts: 3,426
    None of the calipers should 'float' both should be firmly attached, check the bolt through the front fork to see if it's loose, if it is you normally need an allen key to tighten it. :)
  • GiantMike
    GiantMike Posts: 3,139
    As above. There's usually a 'rough washer' that digs into the forks to stop the central bolt from swivelling. It might be that this is slipping and a quick tweak will reseat it and it will grip again. The bolt may be a torx bolt through the back of the forks, so if an allen key doesn't fit it might be simpler to let the LBS tweak it (should take about 10 seconds).
  • hairy_boy
    hairy_boy Posts: 345
    Thanks Guys,

    will check and try to tighten the caliper tonight. Thanks for the replies, much appreciated
  • sungod
    sungod Posts: 16,845
    rather than just tighten it, i'd remove the caliper and inspect the bolt/nut for signs of distortion or other damage

    that fixing is safety critical and subjected to high load, best to be 100% sure it's ok
    my bike - faster than god's and twice as shiny
  • hairy_boy
    hairy_boy Posts: 345
    sungod wrote:
    rather than just tighten it, i'd remove the caliper and inspect the bolt/nut for signs of distortion or other damage

    that fixing is safety critical and subjected to high load, best to be 100% sure it's ok

    Good advice I think, I will remove and check it over before re-attaching/tightening up.

    Thanks
  • hairy_boy
    hairy_boy Posts: 345
    All sorted, thanks for your help guys. Removed the bolt (just needed and allen key), checked, cleaned then re-assembled and tightened up. Adjusted the small screw on top so the gap between pads and rim are about right and all now working well.

    Thanks again.