Shimano BMR2S1 Di2 Small External Battery Mount Bike Accessories Brand_Campagnolo the Sleeveless Reaction takes all

the Sleeveless Reaction takes all the key performance upgrades and removes the full sleeves

the brackets hold the armrests set back 20mm from the center of the base bar or you can reverse the armrests for a forward position

Patent pending arch clamp provides 14 degrees of adjustment

and comes with a rubber band and zip tie mounts

Solid Modes: Overdrive (1600 Lumens): 1

Shimano BMR2S1 Di2 Small External Battery Mount Bike Accessories Brand_Campagnolo the Sleeveless Reaction takes allShimano Di2 External Battery Mounts All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions For use on frames that have a specific Di2 battery mounting location on the chainstay or down tube Compatible with both internal and external wiring kits 10mm mounting bolts