Sram Etap Battery Front Or Rear Derailleur

Sram red etap battery is e power source for the etap system. The same power unit is interchangeable between front and rear derailleurs.Up to 1000 kilometers of riding per charge

Sram red etap battery is e power source for the etap system. The same power unit is interchangeable between front and rear derailleurs.Up to 1000