... factory price 5.CE,EN15194,RoHS, MSDS, UN38.3 21 speed 36v 250w foldable 26" e-bke kit Hot Sale500pcs ... designOverall dimension: 1760*660*1030mmMotor: 250W brushless gearedDrive model: rear wheel driveBattery: LICI® Li-ion type, down tube mounted, ... pedal assist modes of electric powerDerailleur: SHIMANO 3*7 speed freewheel derailleur, SHIMANO shifterBrakes: alloy levers, disk brake, baking power ...