I purchased my Bonnell 775 MX a month ago. I had hoped to get an e-MTB with a single gear and no derailer that I could ride at my preferred cadence (70 RPM) and use the throttle as needed to maintain my preferred cadence on inclines, rather than having to down shift. I was disappointed to find that my preferred cadence only allowed me to ride at 9 mph. Normally, I ride most MTB trails at around 15 mph. I purchased a 22T rear sprocket from Boennell and replaced the standard 24T sprocket. That only got me up to 11 mph. Since 22T is as small as sprocket that Bonnell offers, I decided to make my own 16T sprocket which I calculated would allow me to achieve my goal. The 16T sprocket worked perfectly until I came to a steep incline. Due to the high torque, the teeth on the 16T sprocket that I had made, broke off the sprocket. I see that the smallest sprocket on the 5 speed CYC HD drive train kit is 15T so I am in the process of installing the CYC kit. Hopefully, the 15T sprocket on the CYC kit will be much stronger than the 16T sprocket that I made and allow me to ride at my preferred cadence. I will then have to live with a derailer.
