Originally Posted by
Brocephus
I just measure from the bottom of the drop-out to the bottom edge of the headset cup, and it's 19 inches (so, subtract half an inch since I didn't measure from the axle.)
Millimeters are a better measurement to use.
Your fork has about 480mm a/c
Subtract 25mm off that measurement for sag and you'll need a fork with about 455mm a/c
453mm a/c:
https://surlybikes.com/parts/forks/1x1_fork
https://www.bikenashbar.com/cycling/...rk-ns-cmf-base
A few mm's more or less won't matter.