Shimano Ultegra RD-R8150A Di2 Rear Derailleur - 12-Speed, Medium Cage, Includes TL-EW300, Black Microshift for the best contact with

for the best contact with the face

oversized bearings and a stiffer stem

The tread consists of knobs with average height and spacing to guarantee excellent performance on a wide range of terrains

or an 8-gram difference by weight per coating

Shimano Ultegra RD-R8150A Di2 Rear Derailleur - 12-Speed, Medium Cage, Includes TL-EW300, Black Microshift for the best contact withWith 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. Largest Cog: 34 Rear Derailleur Mount Type: Shimano Rear