The integrated down tube is made by gravity casting and applicable to bosch system: Gen4 motor + PT750 battery. Available Motor system: Bosch

The integrated down tube is made by gravity casting and applicable to shimano system: EP8 motor + 8036 battery. Available Motor system: Shimano

Head tube、links、bottom brocket is made by gravity casting and applicable to all types bicycles.

The integrated down tube is made by gravity casting and applicable to bosch system: sx motor + cpt400 battery. Available Motor system: Bosch

The integrated down tube is made by gravity casting and applicable to bosch system: Gen4 motor + PT750 battery. Available Motor system: Bosch

The integrated down tube is made by gravity casting and applicable to shimano system: EP8 motor + 8036 battery. Available Motor system: Shimano

Head tube、links、bottom brocket is made by gravity casting and applicable to all types bicycles.