I'm rebuilding my bike frame as a steel box to contain the ebike parts rather than having them strapped to the outside of the original frame. To complicate matters I'm also increasing both fork and rear shock travel. This was originally a paltry 1" rear 2" front. I upgraded this to 2"/2" (the forks were 4" but only 2" travel in reality). I now plan to fit a 3 or 3.5" rear shock and proper 4" forks.
I don't want to completely screw up the geometry and in building the frame I'm free to move everything about. So far I have moved the rear shock mounting point to keep the original wheel height the same when sat on the bike, there will just be more travel.
Am I right in thinking that 4" forks will be longer and I should move the head tube to suit?
I figure the front and rear axles should be the same height (level)? What height should the cranks be relative to them?
I guess there must be "golden rules" of frame/suspension geometry but I'm sadly ignorant of them...
Thanks
I don't want to completely screw up the geometry and in building the frame I'm free to move everything about. So far I have moved the rear shock mounting point to keep the original wheel height the same when sat on the bike, there will just be more travel.
Am I right in thinking that 4" forks will be longer and I should move the head tube to suit?
I figure the front and rear axles should be the same height (level)? What height should the cranks be relative to them?
I guess there must be "golden rules" of frame/suspension geometry but I'm sadly ignorant of them...
Thanks