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Problem installing disc caliper
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
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On Wed, 23 Feb 2005 18:43:09 -0800, "CEarly" may have
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. |
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On Wed, 23 Feb 2005 18:43:09 -0800, "CEarly" wrote:
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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