Brake trouble

The Big Cheese
The Big Cheese Posts: 8,651
edited February 2008 in MTB workshop & tech
I have got some brake-rub issues with my Avid Juicy Carbons.

I 'accidentally' squeezed the brake lever with no disc in - you know the rest.

I walked the pistons back in using a large flat blade screwdriver and they went back in o problem

However, since fitting original rotors (G2) with DT Swiss Center lock Adapters (now running XTR splined hubs) I have had nothing but problems - the brakes are in excellent working order but do you think it's because I am using the adapters? Alignment issues?

I have loosened the caliper bolts off and re-aligned the brakes, the pistons are fine, they don't need bleeding etc so I really am at a loose end.

I am seriously considering buying some XTR brakes with splined rotors because of this as I can't, no matter how hard I try get this combo to stop rubbing....

HELP!

:? :x

Comments

  • supersonic
    supersonic Posts: 82,708
    Are the pisotns operating at the same speed, and retracting fully?
  • Yep - this is what I can't understand SS.....
  • supersonic
    supersonic Posts: 82,708
    Disc not warped? Sometimes after re aligning, they need to bed back in. Is the rubbing excessive, noticably dragging?
  • Yep, if I lift the front wheel off the ground a spin the wheel by hand it goes about 2 revolutions and stops.

    Obviously I have not ridden it whilst like this - but even my LBS were clueless......

    They think it's mixing the rotor systems... ie Avid, splined hubs etc

    But as I said to LBS - I know plenty of people that run this setup.

    Discs are not warped - the wheels are brand new and true....

    :lol:
  • PS: Back brake is the same
  • supersonic
    supersonic Posts: 82,708
    Sounds like something is moving after you set them up. The Avid tri align system can slip sometimes on the bevelled washers.
  • nicklouse
    nicklouse Posts: 50,675
    use the adjuster and back the pads off. and then just use till bedded in. then tweak.
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  • Jimbob_no5
    Jimbob_no5 Posts: 1,568
    the disc itself could be bent slightly i found that with the hayes 185mm rotors i have
    Pinkbike

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  • Cheerslads Ill give it a go - or maybe take it to a different bike shop and see if they can sort it

    That's if I can't get it to work....
  • he he

    After SS's and Nicklouses post I realised that someone (and not me before you all jump to conclusions :wink: ) had wound the pad adjust button all the way in....

    Could only be my LBS as I don't normally fettle with that as it was set up nice the way it was....

    NOW to find the offending culprit (unless it was the nephew - he's 10!)

    JOB DONE! :D
  • ddraver
    ddraver Posts: 26,695
    avid juicy carbons don't have a pad adjuster - does the bite point thingum actually move the pads?!
    We're in danger of confusing passion with incompetence
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  • cjw
    cjw Posts: 1,889
    ddraver wrote:
    avid juicy carbons don't have a pad adjuster - does the bite point thingum actually move the pads?!

    They do... it's the little hidden allen key on top of the reservoir markied "->in". It moves the pistons in and out. From memory, in moves them in towards the caliper (away from the disk) which seemed counter-intuitive to me.
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