{"product_id":"shimano-xt-cs-m8100-12s-cassette","title":"Shimano XT CS-M8100 12s Cassette","description":"\u003cdiv\u003e\n\u003cp\u003eThe \u003cstrong\u003eShimano XT CS-M8100 12s Cassette\u003c\/strong\u003e sits at the heart of Shimano's 12-speed mountain bike drivetrain — a cassette that delivers the same wide gear range as the flagship tier but built from a combination of aluminum and steel rather than titanium. That construction keeps weight competitive while prioritising the durability that trail and enduro riders actually need over thousands of kilometres. Both available ratios — 10-45T and 10-51T — are compatible with 1x and 2x setups, covering everything from cross-country to steep technical terrain.\u003c\/p\u003e\n\n\u003cp\u003eCompatibility requires a Micro Spline freehub body, which is worth confirming before ordering if you're running an older hub. The \u003cstrong\u003eHyperglide+ tooth profiling\u003c\/strong\u003e is designed to maintain smooth, precise shifting under load — a meaningful advantage when you're pushing hard out of a corner or grinding up a sustained climb and need the rear derailleur to find the next gear without hesitation.\u003c\/p\u003e\n\n\u003ch3\u003eShimano XT CS-M8100 12s Cassette Specs at a Glance\u003c\/h3\u003e\n\u003cul class=\"specs_at_a_glance\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpeeds:\u003c\/strong\u003e 12-speed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCog range:\u003c\/strong\u003e 10-45T or 10-51T\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 461g (10-45T) \/ 470g (10-51T)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum carrier, aluminum\/steel cogs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFreehub compatibility:\u003c\/strong\u003e Micro Spline only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Shimano","offers":[{"title":"10x45 \/ Black","offer_id":43594822484012,"sku":"ICSM8100045","price":195.0,"currency_code":"USD","in_stock":true},{"title":"10x51 \/ Black","offer_id":43594822516780,"sku":"ICSM8100051","price":195.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/7684\/9196\/files\/shimano-xt-cs-m8100-12s-cassette-8112798.jpg?v=1771294573","url":"https:\/\/ricycles.com\/products\/shimano-xt-cs-m8100-12s-cassette","provider":"RA Cycles","version":"1.0","type":"link"}