With the fast and accurate Di2 shifting technology, the Shimano 12-speed Ultegra RD-R8150 rear derailleur is extremely versatile thanks to a single cage length option compatible with 11-28, 11-30, and 11-34 cassettes.Compact design includes an integrated wireless unit, charger, switch. Wider range capacity. Max. low sprocket 34t. LED status indicator. Battery indicator, pairing, adjust mode etc.. Item Specifications: Largest Cog, 34, Rear Der/Shifter Compatibility, Shimano Road Di2, Rear Derailleur Mount Type, Shimano Rear Direct Mount, Rear Derailleur Mount Type, 10x1 Standard, Drivetrain Speeds, 12, Chain Wrap Capacity (teeth), 39, Cage Length, Medium, Color, Black,.
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