Cycling Equipment · Public discussion

Problem installing disc caliper

Started by CEarly · · Last activity · 3 posts · 692 views

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Cycling Equipment
Published
24 February 2005
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24 February 2005
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CEarly
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  1. If someone can tell me what I'm missing, I'd appreciate it.

    Here's the deal:
    I'm attaching a Hope Mono M4 disc caliper to a RockShox Reba Team fork (ISO
    disc). The front hub is Chris King ISO disc. The caliper comes with
    several washers to shim it toward the center of the wheel, to get it
    centered over the disc, but my problem is that without any washers, the
    caliper is already slightly too far (about 1-1.5mm)toward the center of the
    wheel. This is causing the rotor to rub on the caliper body a bit (noise,
    drag). I can't see any way to move the caliper away from the center of the
    wheel without having some sort of machining done on either the ISO mounts on
    the fork, or on the mounting areas of the caliper. Is that the only
    solution?

    TIA,

    Cal

  2. On Wed, 23 Feb 2005 18:43:09 -0800, "CEarly" <[email hidden]> may have

    Quoted message said:

    I'm attaching a Hope Mono M4 disc caliper to a RockShox Reba Team fork (ISO
    disc). The front hub is Chris King ISO disc. The caliper comes with
    several washers to shim it toward the center of the wheel, to get it
    centered over the disc, but my problem is that without any washers, the
    caliper is already slightly too far (about 1-1.5mm)toward the center of the
    wheel. This is causing the rotor to rub on the caliper body a bit (noise,
    drag). I can't see any way to move the caliper away from the center of the
    wheel without having some sort of machining done on either the ISO mounts on
    the fork, or on the mounting areas of the caliper. Is that the only
    solution?

    There is one other way to address this, though I wouldn't try it
    unless all other non-machining-based methods had been exhausted; have
    a machine shop face 1.5 millimeter off the disc mounting surface,
    provided that there's adequate depth for the screws. Personally, I'd
    prefer to machine the hub rather than to remove material from the
    relatively dainty caliper mounting lugs. *Neither* solution should be
    necessary, however; I'd contact the people at Chris King for advice
    before doing anything at all. (They're probably the easiest to get a
    straight answer from, in this situation.)

    One question; do you have any other brand of caliper available to use
    for fitment check, and do you have access to a different disc-equipped
    bike that you could drop the wheel into to see if the same problem
    exists with another fork and caliper setup? If the clearance issue
    follows the hub around from bike to bike, you know where the solution
    needs to come from. If it doesn't, then the hub's probably OK but the
    fork/caliper combination or one of the two components isn't.

    --
    My email address is antispammed; pull WEEDS if replying via e-mail.
    Typoes are not a bug, they're a feature.
    Words processed in a facility that contains nuts.

  3. CEarly said:

    If someone can tell me what I'm missing, I'd appreciate it.

    Here's the deal:
    I'm attaching a Hope Mono M4 disc caliper to a RockShox Reba Team fork (ISO
    disc).

    Hope has a tool that surfaces the mounting surface... Magura has one
    as well... I had to have mine done for the maguras because the
    surfaces were not "true" causing mis-alignment... either a crash or
    that way from the factory.. don't know.

    but the re-surfacing worked just fine..

    charlieb in ct.

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