The Shimano Ultegra CSR8101 1134T 12speed Road Cassette brings smooth precise shifting to every ride Thanks to HYPERGLIDE technology gear changes feel seamless whether youre climbing a steep hill or pushing hard on a sprint No need to ease off your effortevery shift happens quickly and effortlessly With 12 gears it offers a wider range for tackling climbs descents and flat stretches with ease Larger cogs improve efficiency letting you ride longer and stronger Compatibility with existing HYPERGLIDE freehub bodies ensures you can upgrade without overhauling your setup Built for reliability and performance it redefines what smooth shifting feels like letting you focus on the ride aheadFeatures Refined 12 step gear combination provides peak efficiency and accelerating performance for every racing situation Faster smoother shifts under maximum pedaling force Compatible with new 12speed and road 11speed FREEHUB body111213141517192124273034T Compatible chain HG 12speed

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