3-Speed Crank Axle Gearbox Three gear ratios are possible with this 3-Speed Crank Axle Gear Box. Gear it for power or speed. Durability and reliability are attained with high-quality gears and gear case. A FA-130 motor an...más info +
High Power Gear Box H.E The High Power Gear Box, High Efficiency, works well when extra torque is necessary. Two gear ratios are possible, and a RE-260 motor is included. Several types of crank arms are included for ex...más info +
