Shimano Ultegra 12-Speed CS-R8101 Hyperglide+ Road Cassette Sprocket Variant:11-34T Each tooth's thickness is toleranced

Each tooth's thickness is toleranced and controlled to work seamlessly with the chain's inner and outer links

the 40 Carbon Disc was built for riders looking to upgrade their experience with quicker acceleration and lower rotational weight on climbs and rolling terrain

Spring Technology: The SPEEDPLAY Easy Tension cleat utilizes spring technology to allow for an easy and effective clipless experience

Platform size: W103mm x L98mm x H17mm

Shimano Ultegra 12-Speed CS-R8101 Hyperglide+ Road Cassette Sprocket Variant:11-34T Each tooth's thickness is tolerancedSHIMANO ULTEGRA 12 speed HYPERGLIDE+ Road Cassette CS R8101 12 NEW The uninterrupted shifting experience of the ULTEGRA R8100 12 speed cassette range lets you climb, sprint, or cruise without stopping to think about your next gear change. Larger driving cogs maximize drivetrain efficiency and create compatibility with both Shimano 11 and 12 speed FREEHUB bodies. HYPERGLIDE+ cassettes revolutionized off road shifting with its seamless shifts both up