... parts, alloy capwasher alloy, 3*10mmB.B. parts sealed bearing, axle L: 103mmchainringalloy46T*1/8", CNCcrankalloy170mm, square hole, 5 arms ... (excluding deliberate or accidental damage) 2 years5. Front and rear axle, flywheel or chain wheel 1 year6. Electro plating, on ... Brand new Li-polymer battery, high safety and long service life5, reliable certificates for special marketMain marketNorth America, ...