Shimano BT-R1A External Di2 Battery 2.5mm/5mm/10mm/20mm Color Stealth Defined Color Black

Color Stealth Defined Color Black Gender/Age Adult Pad Type Reactive Polymer Protection Area Elbow Size X-Large

Racing inspired speed and feel with the everyday durability of nylon construction

Multi-use tool that is used to pre-stretch cables and to micro-adjust them

Durable rattle-free bracket features tool-free mounting

5-65mm rate (lbs) 550 color red

Shimano BT-R1A External Di2 Battery 2.5mm/5mm/10mm/20mm Color Stealth Defined Color BlackShimano BT R1A External Di2 Battery. Shimano 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 from http: e tubeproject. shimano. com TECH SPECS Shifter Derailleur Compatibility Dura Ace 7970 Di2 Shifter Derailleur