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As far as I know the adapters are universal, I used some old formula ones I had knocking around when installing my BB7's. My BB7 came with an adapter anyway, but only for 160mm front and 140mm rear, so maybe worth mocking up the brake/rotor fit with the standard supplied fittings and then working out which to buy (I know from building a few mountain bikes that a 180mm adapter on the front only gives you 160mm on the rear sometimes, if that makes sense). However, cool bike!! I look forward to seeing it built up, this was one of the threads that made me finally pull the trigger and order my cotic.
Anybody know if these IS to PM adapters works with Avid BB7 brakes? They're branded Shimano but at 5 quid a piece and if they work I wouldn't mind, not that Shimano is bad just no matchy matchy.
https://www.bike24.de/1.php?content=8;product=4234;menu=1000,4,320,322;pgc%5B18394%5D=18396