I did a bit of digging this morning on the availability of Max Drive bikes available in China and there are a ton of them in the offing as well as a Mid Drive I have never heard of called BIWU.
Anyway here is a sample.
MAX DRIVE CRANK BIKE
BIWU CRANK DRIVE
There is quite a significant price difference between the two motor types.
Anyway here is a sample.
MAX DRIVE CRANK BIKE
BIWU CRANK DRIVE
There is quite a significant price difference between the two motor types.