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Discussion Starter · #1 ·
I want to put a 203 mm rotor on a 2017 Fox 34 fork and a 180 on the rear of a 2012 Stumpjumper FSR Comp. Currently it's 180F/160R without any adapters. I measured the post to post distance on both as ~ 3" so it seems like the 74 mm mounts are what I need. Where I'm getting confused is some of the adapters are listed as 74 mm caliber and 74 mm fork, and others as 51 mm fork. If I don't have adapters currently, I'd think I have 74 mm fork, correct?

Thanks in advance.
 
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