Hello and thank you in advance for your input. I have a Bafang BBS02 750W midwheel motor and 48V battery. I had purchased a used Mongoose Iboc SX with aluminum Ritchie frame and had the kit installed, and despite multiple gear adjustments kept having problems shifting to 9th gear. Mechanic felt maybe the frame was too flexible to support the power of the motor.
Therefore, I am searching for another bike to convert. I am commuting 32miles (semi hilly) round trip almost daily and need advice on a good bike with sturdy frame to support motor. I am looking at the following bikes:
Specialized Crosstrail Disc, Scott Aspect 740, Cannondale Cujo 3, KHS Ultrasport, KHS Sixfifty 200.
Any input would be so helpful.