Ultralight battery holder for Factory One
Brand:
Overfast ultralight battery mount for Factory One
Secure fit, no rattle
Material: carbon
The Shimano Di2 model integrates a hanger for the Shimano battery (battery not supplied)
The Sram AXS model is a cover (the AXS batteries are integrated in the derailleurs)
Finish: carbon 3K black for Shimano model, carbon 3K silver for Sram model
Weights
Sram AXS: 4gr
Shimano Di2: 7gr