Shimano Ultegra RD-R8150 Di2 - 12-Speed Rear Derailleur Brakes Note: standard Guide / G2

Note: standard Guide / G2 (R

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Shimano Ultegra RD-R8150 Di2 - 12-Speed Rear Derailleur Brakes Note: standard Guide / G2Shimano Ultegra RD R8150 Di2 12 Speed Rear Derailleur The Shimano Ultegra RD R8150 is the Di2 electronic rear derailleur from the R8100 groupset delivering instant, flawless 12 speed shifting with the speed and precision that has made Di2 the benchmark for electronic drivetrains. Every shift lands perfectly, every time, whether you're sprinting for a sign or grinding up a long climb in the wet. Semi wireless Di2 architecture means clean, fast setup,