Just did a test ride on my Frey CC no problems so far the bike is fast highest speed with throttle 33 miles an hour I weigh 215 lb. Drained the battery down to 40% for 13 miles of riding up hills grade 4% to 12% hills. Use the throttle alot and power assist 1 through 5 and sport mode just for testing this bike is fast. Using the throttle from dead stop I just put a little pressure on the pedal to get rolling.