Bike master can you help me!

Sharkyssurfers
Sharkyssurfers Posts: 767
edited June 2012 in Commuting chat
Bike Master,

I am stuck on level 40 of (cough cough cough),

Sorry wrong master there :oops: . Bike Master(s) i have a problem in that my back shimano brake does not release when I use it, so i have to eother ride with the brake blocks rubbing great for power training, or wait till i'm at the lights to release them by hand, any tips on what it could be?
Sorry its not me it's the bike ;o)

Strava Dude link http://www.strava.com/athletes/amander
Commuting, Domestic & Pleasure : Specialized Sectuer Sport Disc

Please Sponsor http://www.justgiving.com/alister-manderfield1

Comments

  • SimonAH
    SimonAH Posts: 3,730
    It's either going to be the cable, the hinge of the caliper or the lever. One (or more) of these is sticky / gummed up with crud.

    It's an elimination thing! first loosen the bolt that clamps the cable on the caliper and then open and close the caliper by squeezing on the blocks. If it springs back firmly when released then it's the cable or the lever. If it doesn't spring back firmly then remove it, thoroughly clean and degrease it, lube it and refit.
    FCN 5 belt driven fixie for city bits
    CAADX 105 beastie for bumpy bits
    Litespeed L3 for Strava bits

    Smoke me a kipper, I'll be back for breakfast.
  • mudcow007
    mudcow007 Posts: 3,861
    this is what i normally do - disconnect brake from cable, manually push brake to the rim to see how much effort the springs are putting in, if you feel no resistance from springs, those suckers need adjusting.

    if springs feel fine, then its your cable, just replace it, they are only about £5 for a Jagwire (they are a pain in the arris to cut though)

    or.. your blocks are get caught on the wear line on the rim (small indentation to show how much wear your rims have got) check to see what the blocks are getting caught on

    enjoy
    Keeping it classy since '83
  • iclestu
    iclestu Posts: 503
    check anywhere where the brake cable goes into an outer covering or passes through frame housing bits.

    My old hybrid brake cable always seemed to get splashes of mud in one particular bit where it came out of the outer casing and caused the rear brakes to stick a little. I just washed it off and sprayed the cable with GT85 and it went right as rain again (till next time!)
    FCN 7: Dawes Galaxy Ultra 2012 - sofa-like comfort to eat up the miles

    Reserve: 2010 Boardman CX Pro
  • MichaelW
    MichaelW Posts: 2,164
    Sounds like a frayed cable inside the outer. Check and/or replace cables as neccessary.
  • Sharkyssurfers
    Sharkyssurfers Posts: 767
    cheers chaps, will have a look, i did wash the bike at the weekend so could of missed a bit
    Sorry its not me it's the bike ;o)

    Strava Dude link http://www.strava.com/athletes/amander
    Commuting, Domestic & Pleasure : Specialized Sectuer Sport Disc

    Please Sponsor http://www.justgiving.com/alister-manderfield1
  • Twostage
    Twostage Posts: 987
    My rear brakes get like this, particularly after a spell of wet weather. I just lube all the bits of the brake (apart from the blocks :wink: ). If I'm doing a proper job I take off the blocks if not I just wrap them in paper towel. They have their springiness back by the morning.

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