The geometry of a front suspension bike is based on the assumption of 20% sag. If you lock the fork at full extension, measure axle to crown, then subtract 15mm and you’ll be right about where the design is intended. A few mm either way won’t be catastrophic. If the diameter of the head tube is smaller on top and larger on the bottom then your steerer is tapered. I highly doubt you’ll be able to use the same bearings from the suspension fork on the rigid, so be prepared for a bit of detective work to figure out what will work — the solution could be anything from easy to impossible.


-Kedosto