Conquer any climb and maintain speed on the flats with the Shimano Ultegra CS-R8101 12-speed cassette, engineered to deliver a versatile gear range and seamless shifting for a new era of road cycling.

The Shimano Ultegra CS-R8101 12-speed cassette is the definitive solution for cyclists seeking a wide-range gearing option within the new Ultegra platform. Featuring Shimanos revolutionary Hyperglide+ technology, this cassette is meticulously designed to provide smoother, faster shifts both up and down, even when pedaling under extreme power. The expansive 11-34T gear range offers an excellent blend of close-ratio cogs for cadence control and a generous 34-tooth cog for conquering the steepest gradients with ease. Constructed for an optimal balance of durability and weight, this cassette ensures long-lasting, high-performance, and the reliable feel you expect from the Ultegra series.

• Shimano Hyperglide+ technology enables faster and smoother shifting under load.
• Wide 11-34T gear range is ideal for tackling steep climbs and diverse terrain.
• Designed for Shimano 12-speed road drivetrains.
• Durable construction ensures long-lasting performance and reliability.
• A cornerstone of the Shimano Ultegra R8100 series, offering high-end performance at a great value.