Shimano Dura-Ace CS-R9200 12sp cassette

Faster, seamless gear shifting under maximum pedal pressure
・Sophisticated 12-step sprocket combination delivers optimum efficiency and acceleration performance for every situation
 "Add a 34T chainring for professional racing
Suitable for the new 12-speed and 11-speed racing freewheel hubs
Product details
HYPERGLIDE+ cassettes offer a revolutionary off-road shifting system with seamless shifting at both extremes of hot range. Now it's time for the technology to change road cycling too. Even at maximum effort on a climb or just before the finish line, you won't have to slow down to change gears. DURA-ACE R9250 drives offer maximum efficiency in every gear thanks to the larger gears and are still suitable for existing 11-speed freewheel hubs. In addition, DURA-ACE CS-R9200 cassettes now have 12 gears and weigh less, a new benchmark for shifting on the road.

Translated with www.DeepL.com/Translator (free version)