[dremd]

I opted to wait until I received the motor to purchase a small sprocket due to lack of specs (shaft size / RPM range). So I hooked it up to my EV boat battery pack (also 48 volts) while in my vise only to have it fly out immediately, this thing has serious 0 RPM power! I re-clamped and continued testing with my "digital" optical tachometer. I got 6570 RPM no load at 48 volts (probably more like 52 volts) and 3240 RPM no load at 24 volts (probably more like 26). From that I guessed that I'd have about 3000 RPM at max load / power.
I also measured the Tire circumference to be 42" and the driven sprocket has 36 teeth.
From there I calculated that with the smallest ANSI 41 sprocket available (6 tooth) I should see 20 mph@ 3000 rpm, faster than desired, but slowest easily available gear ratio.