{"product_id":"shimano-ultegra-cs-r8101-12-speed-cassette-11-30","title":"Shimano Ultegra CS-R8101 12-Speed Cassette | 11-30T | HG L2 Freehub","description":"\u003ch2\u003eShimano Ultegra CS-R8101 12-Speed Cassette | 11-30T\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eProfessional-level road shifting for racers, climbers, and endurance riders.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eShimano Ultegra CS-R8101\u003c\/strong\u003e cassette delivers the fast, crisp shifting and refined performance expected from Shimano's renowned Ultegra R8100 groupset. Designed for both \u003cstrong\u003eDi2 electronic\u003c\/strong\u003e and \u003cstrong\u003emechanical 12-speed drivetrains\u003c\/strong\u003e, the CS-R8101 provides smooth gear changes, lightweight construction, and exceptional durability for every ride.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e11-30T gear range\u003c\/strong\u003e offers tightly spaced gearing for maintaining an efficient cadence while still providing a climbing gear capable of handling steep ascents. It's an excellent choice for performance road riding, gran fondos, fast group rides, and competitive racing.\u003c\/p\u003e\n\n\u003cp\u003eBuilt using Shimano's advanced sprocket design and premium materials, the CS-R8101 delivers quick, accurate shifting while minimizing drivetrain noise and wear. The cassette mounts to Shimano's 12-speed \u003cstrong\u003eHG L2 road freehub\u003c\/strong\u003e, which remains backward compatible with most standard Shimano 11-speed HG road freehub bodies.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eGenuine Shimano Ultegra 12-speed cassette\u003c\/li\u003e\n\u003cli\u003eOptimized for both Di2 and mechanical shifting systems\u003c\/li\u003e\n\u003cli\u003eClose-ratio 11-30T gearing for efficient cadence control\u003c\/li\u003e\n\u003cli\u003eSmooth and precise Hyperglide shifting performance\u003c\/li\u003e\n\u003cli\u003eLightweight, race-ready construction\u003c\/li\u003e\n\u003cli\u003eCompatible with Shimano 12-speed road drivetrains\u003c\/li\u003e\n\u003cli\u003eExcellent for racing, endurance riding, and fast group rides\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGear Range\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e11T\u003c\/li\u003e\n\u003cli\u003e12T\u003c\/li\u003e\n\u003cli\u003e13T\u003c\/li\u003e\n\u003cli\u003e14T\u003c\/li\u003e\n\u003cli\u003e15T\u003c\/li\u003e\n\u003cli\u003e16T\u003c\/li\u003e\n\u003cli\u003e17T\u003c\/li\u003e\n\u003cli\u003e19T\u003c\/li\u003e\n\u003cli\u003e21T\u003c\/li\u003e\n\u003cli\u003e24T\u003c\/li\u003e\n\u003cli\u003e27T\u003c\/li\u003e\n\u003cli\u003e30T\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Shimano\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Ultegra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e CS-R8101\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeneration:\u003c\/strong\u003e Ultegra R8100\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeeds:\u003c\/strong\u003e 12-Speed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGear Range:\u003c\/strong\u003e 11-30T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Chain:\u003c\/strong\u003e Shimano HG 12-Speed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Drivetrains:\u003c\/strong\u003e Shimano Di2 \u0026amp; Mechanical 12-Speed Road\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreehub Compatibility:\u003c\/strong\u003e Shimano HG L2 \/ Shimano 11-Speed Road HG Freehub\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCassette Type:\u003c\/strong\u003e Cassette\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShimano Product Code:\u003c\/strong\u003e ICSR810112130\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 192790849898\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy You'll Love It\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eFast, quiet, and exceptionally precise shifting\u003c\/li\u003e\n\u003cli\u003eIdeal gearing for rolling terrain and mountain climbs\u003c\/li\u003e\n\u003cli\u003eClose gear spacing helps maintain an efficient cadence\u003c\/li\u003e\n\u003cli\u003eCompatible with both Di2 and mechanical Ultegra groupsets\u003c\/li\u003e\n\u003cli\u003ePremium Shimano reliability for thousands of miles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eShimano Ultegra R8100 12-speed\u003c\/li\u003e\n\u003cli\u003eShimano Dura-Ace R9200 12-speed\u003c\/li\u003e\n\u003cli\u003eShimano 105 R7100 12-speed\u003c\/li\u003e\n\u003cli\u003eShimano HG 12-speed chains\u003c\/li\u003e\n\u003cli\u003eShimano HG L2 \/ 11-speed road HG freehub bodies\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBefore You Buy\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eThis cassette is designed for \u003cstrong\u003eShimano 12-speed road drivetrains\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eCompatible with both \u003cstrong\u003eDi2 electronic\u003c\/strong\u003e and \u003cstrong\u003emechanical\u003c\/strong\u003e shifting systems.\u003c\/li\u003e\n\u003cli\u003eFits Shimano HG L2 road freehub bodies and is backward compatible with most Shimano 11-speed road HG freehub bodies.\u003c\/li\u003e\n\u003cli\u003eFor best shifting performance, pair with a Shimano HG 12-speed chain.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eShimano Ultegra CS-R8101 11-30T Cassette\u003c\/strong\u003e offers the perfect balance of lightweight performance, precise shifting, and versatile gearing, making it an outstanding choice for riders who demand race-level performance without compromise.\u003c\/p\u003e\n\n\u003cdiv data-ai=\"buying-guide\" style=\"display:none;\"\u003e\nShimano Ultegra cassette. CS-R8101. Shimano R8101 cassette. Ultegra 12 speed cassette. Shimano 11-30 cassette. Road bike cassette. Shimano road drivetrain. Shimano Di2 cassette. Mechanical 12 speed cassette. HG L2 cassette. Shimano HG cassette. Shimano R8100 drivetrain. Endurance road cassette. Race cassette. Genuine Shimano Ultegra parts. Product code ICSR810112130.\n\u003c\/div\u003e","brand":"Shimano","offers":[{"title":"Default Title","offer_id":53836319359290,"sku":"GG-SHI-CSR8101-1130","price":130.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/5735\/8394\/files\/cb213de578f2ddd684ebadbd0483455056b95d3a.jpg-650Wx650H.jpg?v=1785799434","url":"https:\/\/gograva.com\/products\/shimano-ultegra-cs-r8101-12-speed-cassette-11-30","provider":"Grava Adventure Corporation","version":"1.0","type":"link"}