Performance Bike
Shimano Di2 BTR2 Internal Battery Seat Tube Shim
- Performance Bike$11.99Buy
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From Performance Bike
Shimano Di2 External Battery Mounts Features: 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/