Shimano SLX CS-M7100 12 Speed Cassette 10-51

Product details

Both cassettes feature Beam Spider technology for increased weight savings, rigidity and durability. The main difference from XT is one less alloy sprocket and a slightly heavier spider. They also feature the Hyperglide+ technology found in XTR, offering Shimano's smoothest ever shifts.

The 10-51T Wide Range cassette is perfect for riders after a huge range on their 1x set up. It offers a 510% range with smart gear steps for the ultimate climbing machine.

The 10-45T Rythm Step cassette still offers an excellent 450% range but is designed with the perfect ratio in mind. You will give up the super-easy climbing gear but gain more even spacing between the gears and the ability to run a shorter cage derailleur. It can be used with either 1x or 2x setups.

Who's this item for: Any riders after a 12-speed cassette with excellent shifting performance.

Number of gears: 12 speeds.

Weight: The SLX version is only slightly heavier than XT. The 10-51T weighs approximately 534gm, the 10-45T weighs approximately 513gm.

Materials/construction: The first 11 cogs are made from steel, the largest cogs are made from aluminium.

Cog-tooth span:
10-51: 10-12-14-16-18-21-24-28-33-39-45-51T
10-45: 10-12-14-16-18-21-24-28-32-36-40-45T

Freehub mounting style: They mount using Shimano's Microspline freehub.

Pros: Huge range, excellent shifting performance for a 12 speed, and can be used in a 2x setup.

Cons: Shimano's Microspline freehub is not readily available yet. Although they are only slightly heavier than XT, they are pretty hefty cassettes.