Bafang BBSHD 1000W Mid-Drive Kit

A mid-drive motor sits at the cranks and works through the bike gears, which usually suits hills and uneven terrain. The motor body clamps into the bottom bracket shell, so the shell width and thread type decide whether a particular kit can be fitted. Closest alternatives by price: Bafang BBS02B 48V 750W Mid-Drive Conversion Kit ($849), Bafang BBS02B 750W Mid-Drive Kit ($699) and Bafang BBSHD 48V 1000W Mid-Drive Conversion Kit ($1,150).

Anyone planning heavy loads, such as cargo or tandem use, should check that the frame and drivetrain can handle the extra stress. Read the installation guide and ask whether special tools, such as a crank puller or bottom bracket tool, are needed or supplied.

Bafang has 4 products listed, from $699 to $1,150.