engine:Shimano 7speed power systemcritical piecesmotor8FUN highspeed brushless gear 250W frame6061aluminum alloy surface treatment T6front forkaluminum alloy suspension fork, TW ZOOMhead bowlSemi-hidden eight-piece Bowl Qing Haobattery36V/10Ah lifepo4handlebaraluminum alloy XINLONGstemaluminum alloy, quick relaease YINGLONGbrake leaveraluminum alloy with switch powerassist system1:1 speed ...