Ingranaggio di riduzione primario in nylon premium per BBSHD/BBS02 efficienza migliorata
Nylon is a necessary evil is because if steel gears were used it would be very noisy. good compatibility for 01, 02, for HD. Model: for 01, 02,for HD， 03. for Bafang mid-mounted motors 36 V / 48 V 250 W / 350 W / 500 W / 750 W / 1000 W.