Originally Posted by
Bill Kapaun
Spoken by someone that obviously hasn't done it before.
I have. Just the opposite direction.
I have done it before. My old road bike was a 7-speed originally. When I changed the freehub body to 8/9/10 speed, it did not affect the axle spacing in a noticeable way. Maybe I got lucky on the freehub body I chose, but it worked for me.