... price 5.CE,EN15194,RoHS, MSDS, UN38.3 21 speed 36v 250w foldable 26" e-bke kit Hot Sale500pcs in ... or pedal assist modes of electric powerDerailleur: SHIMANO 3*7 speed freewheel derailleur, SHIMANO shifterBrakes: alloy levers, disk brake, baking ... : alarm system, rate-limiting, overrun monitor, Low-voltage protection, Over-current protectionPerformance: load capacity≤100kg, top speed 25km/h, range 45 ...