Fitting XT rear disc brake using AVID elixir mounts & rotor

mikeyj28
mikeyj28 Posts: 754
edited April 2012 in MTB workshop & tech
I fitted my XTrear disc brake (160mm) on Sunday and i went for a 1 minute spin around the estate to check the brake out.
It worked fine with me using the current mounts and Avid G3 rotor.
I removed 1 spacer from the mount (in reality 2 were removed as 2 screws are used to clamp the brake to the adaptor/frame). This was done as i felt that using the exact number of spacers/washers from the Elixir brake would have the rotor just reaching the edges of my XT brake pads.
I am just wondering which ones should be removed?
I have taken the spacer from underneath the 160mm adaptor (all that is left is a half moon washer type thing). Is this correct or should i have pulled the spacer from above the adaptor?

Sorry if it all sounds confusing but i want to make sure that i don't mess up the brake/calliper etc as a result of pulling out the wrong spacer.
Constantly trying to upgrade my parts.It is a long road ahead as things are so expensive for little gain. n+1 is always the principle in my mind.

Comments

  • Chunkers1980
    Chunkers1980 Posts: 8,035
    They are not intended as spacers, they are washers.

    I'd buy the correct braket.
  • mikeyj28
    mikeyj28 Posts: 754
    Chunkers1980 wrote:
    They are not intended as spacers, they are washers.

    I'd buy the correct braket.

    thought that might be the case.

    oh well i'll have to get the correct bracket. CAn i continue using the G3 rotor or should i just bite the bullet and get the XT rotor?
    Constantly trying to upgrade my parts.It is a long road ahead as things are so expensive for little gain. n+1 is always the principle in my mind.
  • 386ka
    386ka Posts: 479
    No need to buy the correct bracket or rotor, just install them without the CPS system (conical and concave washers). So, remove all of them, just keep the thin washer under the bolt head.
    A much loved, Giant Trance X3 2010
  • mikeyj28
    mikeyj28 Posts: 754
    386ka wrote:
    No need to buy the correct bracket or rotor, just install them without the CPS system (conical and concave washers). So, remove all of them, just keep the thin washer under the bolt head.

    brilliant! Just do as you say and it will all be ok and no damage will result in the long run?
    Constantly trying to upgrade my parts.It is a long road ahead as things are so expensive for little gain. n+1 is always the principle in my mind.
  • 386ka
    386ka Posts: 479
    mikeyj28 wrote:
    386ka wrote:
    No need to buy the correct bracket or rotor, just install them without the CPS system (conical and concave washers). So, remove all of them, just keep the thin washer under the bolt head.

    brilliant! Just do as you say and it will all be ok and no damage will result in the long run?
    Yep. Just, post a pic when you finish the job, just to be sure. Also, see if the disc runs right in where the pads are.
    A much loved, Giant Trance X3 2010
  • nicklouse
    nicklouse Posts: 50,675
    As above. They all work to the same standard or they would not work on the fork directly.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • oodboo
    oodboo Posts: 2,171
    I replaced my elixir brakes with XT and didn't touch the rotors or mounts. Do I need to? Seems to work ok.
    I love horses, best of all the animals. I love horses, they're my friends.

    Strava
  • nicklouse
    nicklouse Posts: 50,675
    No.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • davewalsh
    davewalsh Posts: 587
    When swapping from Avid to any other caliper, you need to ditch ALL the concave / convex spacers (aka the CPS washers), fit a plain washer between the bolt head and caliper and use the new shorter bolts supplied with the caliper or saw the old bolts down if they foul on the chainstay or bottom out in the fork.
    Blue Pig
    Inbred
  • mikeyj28
    mikeyj28 Posts: 754
    386ka wrote:
    mikeyj28 wrote:
    386ka wrote:
    No need to buy the correct bracket or rotor, just install them without the CPS system (conical and concave washers). So, remove all of them, just keep the thin washer under the bolt head.

    brilliant! Just do as you say and it will all be ok and no damage will result in the long run?
    Yep. Just, post a pic when you finish the job, just to be sure. Also, see if the disc runs right in where the pads are.

    Ok i shall do. Thank you for your help on this- it is much appreciated and also saved me a fair few quid too!!
    Constantly trying to upgrade my parts.It is a long road ahead as things are so expensive for little gain. n+1 is always the principle in my mind.

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