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Parts & Accessories
Find the best bike accessories for your ride
Whether you're looking to track your speed or find the latest safety equipment Bob's Bikes has the perfect accessories for your ride. Check out the latest top-performing speed and cadence sensors to help reach your racing goals, or take a look at the crash sensors for a safe ride.
$135.99
Shimano 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
- Use Di2 system checker to update component firmware
$79.99
Shimano BT-R1A External Di2 Battery
- 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
- Di2 External Battery, battery charger, and power cable are universal between Dura-Ace 9070, 7970, Ultegra 6870, 6770 and Alfine Di2 systems
- Battery weight: 71 grams
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