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I have been lucky enough to get hold of a front wheel that comes with a 200mm disc on it. Does this mean I need a 20[b]3[/b]mm adapter to get it to work? or do I have to track down a 200mm adapter?
or change the disc over to the size you have
Well, assuming it's been made exactly to spec it's 3mm larger across, so only 1.5mm on each side (if you see what I mean). Personally, I'd take a washer etc out from the adapter mounts and call it good enough.
smurf
Yes Junkyard, seems like the right thing to do. However it is a [b]5[/b] bolt disc.
I thought the 5 bolt rotors were 205 mm. Certainly the ones are on my enduro 4 calipers. Still, 2.5mm on the radius is not much. I plan to fit some 165mm rotors to some Avid BB7 road calipers (that normally take 160) and fine tune it with a couple of washers.
As long as you've got >1mm clearance between the edge of the disc & the caliper (for expansion) it should be fine.
Try it and see. What's the worst that could happen?
Running a 183disc on a 185 adapter, no trouble here.