Although most gas motor-assisted bikes are made using a single-speed beach cruiser bike frame with coaster brakes, I prefer a mountain bike frame.
It is easy to install the motor onto the cruiser frame, due to the size of the frame¹s "V", and the fact that the tubes are the same size.
. I do not use a cruiser frame for a number of reasons:
· You can only apply the brake forcefully in two crank
positions.
· If your foot slips off the pedal, you can't brake at all.
· If your chain breaks or falls off, the brake fails.
· If you don't have a hand-operated front brake, you
can't stop as quickly as with a bike that does have one.
· Cruisers are very awkward to get started, since you
can't easily rotate your cranks to a good starting position.
· There are no front shocks. (Due to the obstacle course
they call a bike lane, shocks are a handy item.)
· When your 20-plus pounds motor kit decides not to run,
it is a lot easier to pedal home with multiple gears to
choose from.