|   XT disc/ hub compatability | Treker
Nov 14, 2002 7:08 PM | | "Disc and hub compatability"
Got what I thoought was a good deal on a XT front disc brake. Converting from V-brake. To get on the trail I purchased a front wheel from the bike shop with a no name disc hub. I bolted the rotor to it and loosely attached the caliper. When I attempted to put the wheel into the fork, the alignment of the rotor/caliperwas way off. So much so that the caliper tangles with the spokes. It appears that the rotor needs to be spaced out about 1/8-1/4 inch from the the hub to keep the caliper out of the spokes. Is this normal or is this hub WAY incorrect for XT disc? |
| You may have an older hub; try Thorsten... | upNdown
Nov 15, 2002 6:32 AM | | Sometime around year 2000, the industry standard for such things changed. So older disc hubs aren't compatible with newer brakes. I had a 2000 brake on a 2000 hub, then when I upgraded to the Shimano XT's, the caliper was rubbing the spokes as you describe. There is an adaptor that shims the rotor out a bit, but good luck finding one. I got mine from Thorsten at thorusa.com but I don't know if it was the only one he had or if he's sitting on a pile of them. |
| You may have an older hub; try Thorsten... | jimbo2k
Nov 16, 2002 4:21 PM | | On some hubs, it is just a matter of switching the left and right spacers. If they are the same you may be out of luck. Jim |
| Shim! | japanrider
Nov 18, 2002 8:26 PM | | I had to shim out my front rotor about 2mm to move the caliper out of my spokes (the manitou fork's post mounts were a part of the problem, as the brakes and hub were new Shimano Deore).
I used six rather thick stainless washers, one for each rotor bolt, between the hub and the disc. The rotor bolts still have plenty of depth in the hub, and it allowed the caliper to be moved safely out of the spokes' path. The rotor runs very near the fork lower, but it's no problem.
Twelve 1mm washers would work as well when stacked in pairs.
I've run all summer on the downhills in Nagano with this setup, and have full confidence in it (no squeal or vibration, etc.)
At least try this before replacing the wheel! |
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