Shimano Dura-Ace CS-R9100 11-Speed Cassette

Using 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.[split]

Specifications
CFRP & Alloy spider arm
5 titanium sprockets
Rider tuned gearing
Lightweight

Gear Ratios
11-28: 11-12-13-14-15-17-19-21-23-25-28
11-30: 11-12-13-14-15-17-19-21-24-27-30

Mfr Claimed Weight
193g (11-28T)
211g (11-30T)