Dura-Ace 9100 11-Speed Cassette

Rider Tuned Gearing
Wider Gear Combination: 11 – 28T/12 – 28T/11 – 30T (New Gear Combination)
Closer Gear Combination: 11 – 25T/12 – 25T
Lightweight
CFRP & Alloy Spider Arm, 5 Titanium Sprockets
Gear Combination: 11 – 25T, 11 – 28T, 11 – 30T (New Gear Combination), 12 – 25T, 12 – 28T