No matter your riding level, you can experience the high-level road shifting performance with Shimano Ultegra and the updated 12-Speed R8100-series components all reflect an overarching reassessment of the most reliable groupset ever offered. The smooth, consistent gear steps remain a Shimano hallmark thanks to the addition of the 12th cog. Keeping things simple, the R8100-series rear derailleur is offered with a single cage length that is compatible with the full range of Shimano's 12-speed road cassettes.

HyperGlide+ cassettes have revolutionized off-road shifting with their seamless shifts both up and down the gear range. Shimano translated that technology from MTB to the tarmac and gravel worlds. Even during maximal efforts up a climb or nearing the finish line, riders no longer need to back off (at all) to perform a fast, solidly reliable shift. The R8100 Ultegra 12-Speed Cassette is compatible with Shimano 11-speed HG freehub bodies as well as the new Shimano 12-speed HG12 L2 road freehub body. All cogs are steel, nickel-plated for longevity, corrosion resistance and Shimano keeps the overall weight down with two aluminum spiders to go along with 5 individual cogs. This is the high mileage cassette that many Dura-Ace riders choose for training year round, in large part to enjoy the value and 1:1 shifting performance of the Dura-Ace titanium-steel cogs of the cassette, without concern for weight, and an eye on overall value.