Nobody wrote:I've heard about this, and the only explanation I've read that makes some sense is that the longer bolts can place more stress on the caliper mounting points.Duck! wrote:...many XC MTB forks also have rotor size limits.
I would argue if the fork caliper mounts were moveable to accommodate different disc sizes, there probably wouldn't be a limit.
they somewhat are movable. most 203mm mounts will move the caliper up instead of out from the mounts... yet plenty of carbon forks will have a 160/180 limit, despite 180 mounts using either longer bolts, or a similar setup to the 203mm mount.