Personalize your ride and your data with Force AXS E1 controls, flat mount brake calipers and the Hammerhead Karoo. Use Bonus Buttons to scroll your head unit or shift your derailleur from our comfortable, powerful and ergonomic controls. All new hood ergonomics are now available for Force. This system has stiffer calipers, one-finger braking from the hoods and drops, Bonus Buttons, and texture to easily locate and actuate the buttons and controls. The Force AXS E1 upgrade kit is compatible with all generations of AXS derailleurs.