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Shimano Ultegra ST-R8150 Di2 STI Gear Shift Levers - Pair
Shimano Ultegra ST-R8150 Di2 STI Gear Shift Levers - Pair
Cables lead from the STI first to a junction box and then to the battery, which in turn is connected to the rear derailleur and front derailleur. Derailleur Compatibility: Shimano Di2. Quick and intuitive shifting.
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