liveforphysics wrote:I'm going to buy the sic bikes eno freewheel, and a regular freewheel, and the dual-drive hub, and make the freewheels fit on the splines by hand with a file. I will make a jig using sprockets clamped to the freewheel's inner portion, and carefully work it with a file until they slide on the splines.
3-spd motor drive, 3-spd pedal drive, no derailer BS, no needle sprauge clutch BS, and completely independant drive isolation.
liveforphysics wrote:And if it doesn't seem like there is adquate room for both to fit onto the short splines of the dual-drive (likely), then I will shave down material from the freewheels until they are thin enough to both fit. If they still don't both fit, I will take the dual drive hub spined portion off, and figure out what it will involve to get the required length spline portion mounted. Likely would involve machining some custom shift rod pieces at the very least, but I'm game for a few challenges.
Miles wrote: BTW, the 9 speed splined driver is exactly the same length as 2 freewheels, so no problem there.
moderator edit: here is Thuds freewheel spline ctutting thread:Miles wrote:If the number of engagement points on the freewheel has a factor of 9, you can use the freewheel mech. to register the spline positions for filing. Then, all you need is a guided file slightly wider than the driver splines.
https://endless-sphere.com/forums/vi ... &p=548136&