36v 500w vs 750w

[fdion]

What is the difference between the two motors or is it simply the controller with a different shunt? Also is that 750w continuous? Finally, I'm interested in max speed above all else, so I would run either at 48v.

This would be a rear wheel application, 135mm, has to be double walled wheel with eyelets. Finally, is there a way to order this from the goldenmotor site (36v motor, 48v controller)? Or should I just get just the hub motor and buy Mavic rims locally and build a wheel? (where to buy the 12g spokes in the proper length?)

[biohazardman]

I believe the windings must be different as the 48V motors have a higher top end speed. If you want the best performance, you will want the 48V motor with the appropriate controller.  I have the 36V motor with 48V and speed wise it only 3mph faster than on 36 volts although torque and hill climbing ability is greatly improved. I just bought the kit, tossed the rim, and since most of the spokes have broken, replaced them with the 12 gauge 170mm Sapim stainless spokes from Dans comp.  They are black in color. I had to use a dremel on the inside of the rim to make the nipple to spoke connection straight.  They don't break anymore. I have heard that even the 14ga US and Swiss made stainless spokes work well also and these may not require the dremel work. Get a wider stronger rim for carefree operation at higher speeds.

[e-lmer]

I suppose if you had the bike to support it you could
restring the 1000W48V motor on a 29 inch rim.

That would go 38/32dths as fast as the 26 inch rim.

GM:
 Do you sell the kit with just the hub motor, no rim?
 That should be about half as much to ship.