26 inch rigid fork on a 27.5 inch mtb Would a 26 inch rigid fork work on a 27.5 rim and frame? I'm looking to replace my suspension fork for a rigid one since i currently only ride my bike on the road (i got slicks and road gearing already) but i cant seem to find 27.5 rigid forks sold near my area.
The key measurement you need is the axle to crown length required. It's the distance from the center of the axle to the bottom of the frame head tube. The axle to crown length takes into account both wheel diameter and suspension compression distance.

Axle to crown length is easy enough to measure with a fork installed in the frame.

Don't forget to also look at the axle offset - how far in front of a straight line drawn through the headtube the axle sits.