It has an inner diameter of 34mm and is 68mm wide
saving up to 100 grams of straw drag
Equipped with a Shimano 8-speed drivetrain
Ramped center knobs roll fast and provide excellent traction for climbing and braking
Classic diamond design adds a dash of elegance
Shimano Ultegra RD-R8150F Di2 Rear Derailleur - 12-Speed, Medium Cage, Includes TL-EW300, Black Sram Eagle XO1 AXS It has an inner diameterWith 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. Color: Black Largest Cog: 34 Rear Derailleur Mount Type: