Shimano 105 CS-R7100 cassette with 12 gears
 
 The Shimano CS-R7100 is the perfect cassette for the new Ultegra 105 Di2 R7100 12-speed groupset. From sprinting on flat terrain to climbing steep hills, the 11-34T cassette has you covered. It's compatible with both SHIMANO 11-speed and 12-speed FREEHUB bodies.
 

 
 THE SCIENCE OF SPEED: Shimano 105 12-speed Cassette CS-R7100
 
 The next-generation SHIMANO 105 with Di2 is based on the design philosophy "The Science of Speed" and brings new momentum, comfort, and control. It lets you embrace the open road, full of infinite possibilities. Dive deeper into your rides. See the world in a fresh new way. And enjoy the gift of every new day.
 

 
 The new SHIMANO 105 brings Di2 shifting to a new set of riders. For those who have only experienced mechanical shifting and ergonomics, SHIMANO 105 Di2 represents a transformation in the road cycling experience. With features and technologies inherited from DURA-ACE and ULTEGRA, SHIMANO 105 is the result of years of research and development. With a shared Di2 platform, advanced ergonomics, SHIMANO 105-optimized gear combinations, and an exceptional brake system, the new SHIMANO 105 marks a new era of affordable performance.
 

 
 FEATURES
 
 Sophisticated 12-step gear combination delivers optimum efficiency and acceleration performance for every situation
 
 Suitable for the new 12-speed and 11-speed racing freewheel hub
 

 
 PRODUCT SPECIFICATIONS
 
 Model number: CS-R7101-12
 
 Series: SHIMANO 105 R7100 Di2 Series
 
 Combination: 11-12-13-14-15-17-19-21-24-27-30-34T (11-34T)
 
 Type: HG (Hyperglide)
 
 Compatible chain: HG 12-speed
 
 Rear gears: 12