High intensity plastic shell, prevent from cracking and not easy to fracture.
Help to detect the action about shifting gear very quickly and shut off the power.
Help riders to avoid problem like chain damaged and cassette breaking.
Replacement for Bafang BBS01 BBS02 BBS03 BBSHD Mid Drive Motor.
Features: High intensity plastic shell, prevent from cracking and not easy to fracture.  Help to detect the action about shifting gear very quickly and shut off the power. Help riders to avoid problem like chain damaged and cassette breaking. Replacement for Bafang BBS01 BBS02 BBS03 BBSHD Mid Drive Motor. Specifications: Material: Plastic / Metal  Model: Model A / Model B / Model C / Model D (optional) Model A Length: 42 cm / 16.5 in  Weight: 15 g / 0.5 oz  Model B Length: 43 cm / 16.9 in  Weight: 25 g / 0.9 oz  Model C Length: 50.8 cm / 20 in  Weight: 25 g / 0.9 oz  Model D Length: 20.3 cm / 8 in  Weight: 20 g / 0.7 oz  Package List: 1 * Program Cable