I've been out for a short test ride today. It was a little bit windy and cold, but not too bad.
Low speed torque seems good, and on some grassy slopes the rear wheel will lose traction before the motor stalls. It has taken me up a long, off-road, rocky path which I estimate is 30% grade.
Without a speedometer I can't be sure but when I shift into top gear it feels like about 23mph. This is more than enough for what I will use this bike for!
Here's a little video of some low-speed testing: (May need to turn volume down, because of wind noise...)
Big thanks to the random guy who agreed to shoot the video clip.
One thing of concern is the sparking that occurs when I connect the batteries. Any ideas how to stop it?
The pedal cadence is stupid.
At full throttle, I'd need to pedal at about 112rpm! (based on 3300 rpm motor @ 37v)
My gear ratios are as follows:
14T motor > 44T chainring, 32T chainring > 12T-32T rear cassette.
I need to use a larger chainwheel, but it already looks stupid-big.