took the bike for one final test ride before handing back to my brother tomorrow... rode 21 miles. mostly at power level 3 and 4. pretty easy to maintain 20 MPH in top gear on level ground, and hit 25 if you want to spin harder (42:11 top gear w/ 26x1.95 means a cadence of about 90 to go 28 MPH). my next build will NOT have a throttle, it doesn't work that well with the TSDZ2, the pedal assist is plenty good enough.
at 20 miles, the battery was still at 4 of 5 bars. at the top of the 1 mile last hill, partly 80% grade, mostly in 5th and 6th gear at 10MPH, the battery indicator was blinking between 3 and 4 bars under load, and when I stopped it reverted to 4 bars. I think this 48V 13.5 AH battery would probably take this bike 60 miles or more.
