... pedal assistant system 3. EN15194 Electric city bike with EN151941. Crank Shaft Electric Bike with Own Exclusive Patent2. More Beautiful, more logical, more ... planetary gear and can be adjusted according to your demands.5. Using Dual-rachet clutch 6. Electric power supply and ... assistant)20. Weight: G.W 24(with battery); N.W 22(with battery)21. Approvals: CE, RoHs, FC, CSA, 3C, ISO9001, ISO9002 ...