NEW Shimano BT-R1A External Di2 Battery - 7970, 9070, 6770, 6870 Type_Chains Mounts to rear rack with

Mounts to rear rack with a hook and lock system

49 cm: 4'8"–5'2"

your brews will travel in style

- Compatible with Matchmaker X clamp

NEW Shimano BT-R1A External Di2 Battery - 7970, 9070, 6770, 6870 Type_Chains Mounts to rear rack withShimano Di2 Batteries. Must purchase battery, charger, and power cable to complete the system. All 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 Shifter Derailleur Compatibility: Dura Ace 7970 Di2 Shifter Derailleur Compatibility: Dura Ace 9070 Di2 Shifter Derailleur Compatibility: Shimano Ultegra Di2