The Lekkie 42-tooth converter is specially designed for Mid-Drives BBS-01 and BBS-02.
42 teeth reduce maximum speed and increase drive torque and terrain permeability. A narrow and wide tooth structure is used on the chainring to eliminate chain derailment. The low weight of 146 g is achieved thanks to the heat-treated 7075 alloy material used. Reducing the chain shift can be solved using a spacer.
Specifications:
Color: black
Material: aluminum CNC 7075, Z6 heat-treated
Tooth: Narrow and wide
Chain displacement: 9 mm
Cassette: compatible with 7-11 pinions
Chain: Shimano compatible chains, some Sram chains do not fit