My stretch bicycle project (Stretch-e-bicycle phase 1) is getting further along but I ran into a snag. I'm using a 48v crystalyte motor and it's wide enough to rub on the forks. The motor barely moves. Dang wish I'd noticed this before now. Good thing about the project is I've got the brakes sorted out and all the welding and stuff is done.
In any case I need a different front fork. I went to the vendors listed on the Support VisForVoltage page and while they carry a variety of forks none appear to be suitable.
I've removed the fork from the frame and the measurements are:-
dropout width - 4 1/4" ... I'm seeing many forks that are 100mm and many other forks don't list a width. Whatever. Obviously 4 1/4" is about 113mm (or so) and 100mm would be too narrow and I'm guessing 130mm or more would be adequate.
steerer tube - 1 1/8" and it has threading at the top to attach it to the frame -- that is, it's a threaded headset and a stem to match. Just looked through Zinn & The Art of Mountain Bike Maintenance -- it's clear if the fork were threadless then I'd have to replace the headset as well as fork.