5X motor and 20â€￾ rim = 77 mm
5X motor and 24â€￾ rim = 138 mm
5X motor and 26â€￾ rim = 165 mm
4X motor and 16â€￾ rim = 57 mm
4X motor and 20â€￾ rim = 106 mm
4X motor and 24â€￾ rim = 165 mm
4X motor and 26â€￾ rim = 190 mm
4X motor and 700c rim = 218 mm
This is a list i made from the parts i received from Crystalyte, the intended rims are double walled.
The motor on the stand is going to be a 408-4012 Rear wheel wih 3 speed freewheel.
I"ll start by installing the spokes with only a few threads each nipple, then take up the slack evenly, finally install the motor into the bike frame and adjust it for the brakes to center up properly.
Depending on the frame used ( how much it will flex ), you can use spacers to shift the hub to an extent and compensate for some dishing, if you opt for a 7 speed you run out of room to shim anything..
This motor is going into a single walled 30mm wide rim. I have a half dozen i need to put to the test and see how they hold up with 12 gauge spokes.
I am a big fan of the double walled rims, first they are stiffer and don't seem as fragile, and 2nd the spoke nipples are recessed into the 1st wall repventing spokes from poking your tube..