So how has this number been ascertained?
The caliper won't move far enough out to deal with a bigger rotor?
Yes, and that's the number he's trying to find out for his forks
I'm saying there is a spec'd maximum size that the manufacturer says you can use, and that they will have tested to make sure that this size is ok to use without tearing the fork apart
@hippy started
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So how has this number been ascertained?