Your Bicycle is a great hub grinder!
Got an old traditional ten-speed or mountain bike alloy hub you don't think the sprocket will fit?
Take a good look at the hub: if it is like most, theres lots of alloy there on the other side, and I think the threads on the frewheel side may just be cut into the same kind of piece-
I just ground down the side of a traditional Schwinn 10 speed hub simply by turning the bike over, and holding a flat metal file against it as I pedalled the wheel.
It's it's own grinder! Hold the file about halfway across the bare alloy side and it cuts a nice groove that stops the sprocket about an eighth of an inch from the flange-
The alloy grinds easily, and there's a lot of thickness there- but take care! My old standard sprocket now fits over this, but I'm not ready to put a motor on yet. Takes several minutes.
Also here is 34 tooth sprocket I got on ebay (seller dadjohnr) for about $10 shipped, and I've drilled 8 holes in it to bolt directly onto the large flange hub-
(I'll have to take this one still somewhere else to get the middle hole drilled to the usual size, but I may try grinding it myself- as you can see, it's quite minimal, 34 teeth, and if I can get it attached this way, will be EXTREMELY lightweight.)
Also notice it's OFFSET out at the teeth, to keep it away from the frame's chain stay!
Last edited by Nashville Kat; 08-12-2009 at 12:29 AM.