Shimano BT-R1A External Di2 Battery 2.5mm/5mm/10mm/20mm 5-65mm rate (lbs) 550 color

5-65mm rate (lbs) 550 color red

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

Rubber feet keep base stationary and add stability

Durable rattle-free bracket features tool-free mounting

110 IS Headset UpperSealed stainless steel bearings

Shimano BT-R1A External Di2 Battery 2.5mm/5mm/10mm/20mm 5-65mm rate (lbs) 550 colorShimano 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