Shimano BMR1 and BRM2 Di2 External Battery Mount Base Unit A CheckoutTitle=Schwalbe Aerothan Tube - 700 x 28 - 35 }Wheels Manufacturing Derailleur Hanger -

}Wheels Manufacturing Derailleur Hanger - 293

Splined driver body compatibility

Hardened drop forged steel resists cutting sawing freezing and chisel attacks

Grip compound maintains traction when wet

Shimano BMR1 and BRM2 Di2 External Battery Mount Base Unit A CheckoutTitle=Schwalbe Aerothan Tube - 700 x 28 - 35 }Wheels Manufacturing Derailleur Hanger -Shimano Di2 External Battery MountsAll Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions Use Di2 system checker to update component firmware from http: e tubeproject. shimano. com