Shimano CS-R9100 DURA-ACE 11-Speed Cassette SprocketUsing a carbon fiber and alloy spider and five titanium sprockets, the DURA ACE R9100 cassette provides accurate shifting and light weight to the most discerning road cyclists on the planet. MODEL NO: CS R9100 SERIES: DURA ACE R9100 Series Average weight: 175 (11 25T) 193 (11 28T) 211 (11 30T) 189 (12 25T) 205 (12 28T) Combination: 11 12 13 14 15 16 17* 19* 21* 23* 25*T 11 12 13 14 15 17 19* 21* 23* 25* 28*T 11 12 13 14 15 17 19* 21* 24* 27* 30*T 12

Fast and quick assemble feature

Sleek aesthetic

Q-Factor: 178 mm

Metal pad material provides maximum braking force and short service life

Bottom Bracket: BB-BB52

Updated brake lever shape with a taller and flatter profile

Allen key type inner cable fixing bolt

The bottom bracket is equipped with a new sealing structure for long lasting performance

Cage Material (RD): Steel

left / right (mm)    : 110/80

Average weight               : 287

Use the Shimano XTR/XT (J04C) Metal Disc Brakes to make your Shimano XTR or XT brakes smooth and compatible