Shimano CS R9100 11 Sp Dura Ace 11 25 Cassette No Boundaries No Buy Shimano Dura Ace CS R9100 11 30 11v Cassette. The best price SHIMANO Dura Ace CS R9100 Cassette for Precision Shifting Shimano Dura Ace CS R9100 11 speed 11 30T cassette. buy online. Experience the precision and performance of the Shimano Dura Ace CS R9100 11 Speed Cassette, designed for serious cyclists who demand the best. This premium cassette combines advanced materials and engineering to enhance your riding experience. CFRP alloy spider arms and 5 titanium sprockets for optimal weight savings. Wide gear range of 11 30 for versatile riding conditions. Precision engineered cogs: 11 12 13 14 15 17 19 21 24 27 30 for smooth shifting. Compatible with Shimano HG 11 12 Speed Road drivetrain systems. Elegant silver gray finish adds a sleek look to your bike. This cassette is ideal for competitive cyclists and enthusiasts seeking to improve their performance on the road. To install, simply replace your existing cassette with the Dura Ace CS R9100, ensuring compatibility with your Shimano drivetrain. Details: Range: 11 30 Cogs: 11 12 13 14 15 17 19 21 24 27 30 Color: Silver Gray