{"product_id":"sram-red-e1-cassette","title":"SRAM RED E1 Cassette","description":"\u003cp data-start=\"119\" data-end=\"390\"\u003eThe SRAM RED E1 Cassette is SRAM’s lightest and most refined road cassette, engineered for ultra-fast, precise shifting and maximum drivetrain efficiency. Designed for RED AXS E1 systems, it delivers a premium balance of wide-range gearing, tight cadence steps, and race-level durability.\u003c\/p\u003e\n\u003chr data-start=\"392\" data-end=\"395\"\u003e\n\u003ch3 data-section-id=\"1v7iqwk\" data-start=\"397\" data-end=\"426\"\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cp data-start=\"428\" data-end=\"683\"\u003eX-Range Wide Gear Progression\u003cbr data-start=\"461\" data-end=\"464\"\u003eAvailable in 10-28T, 10-30T, 10-33T, and 10-36T options, the cassette provides a broad gear range while maintaining carefully tuned cog spacing for smooth cadence transitions. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"685\" data-end=\"940\"\u003eOne-Piece X-DOME Construction\u003cbr data-start=\"718\" data-end=\"721\"\u003eMachined from a single steel block, the X-DOME design increases stiffness, improves durability, and significantly reduces weight for race-optimized performance and efficiency. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"942\" data-end=\"1173\"\u003eAXS Electronic Shift Optimization\u003cbr data-start=\"979\" data-end=\"982\"\u003eEach cog is engineered with shift ramps specifically tuned for electronic shifting, ensuring fast, clean gear changes even under high torque loads. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1175\" data-end=\"1441\"\u003e10-Tooth Start for Maximum Range Efficiency\u003cbr data-start=\"1222\" data-end=\"1225\"\u003eThe 10T smallest cog expands overall gear range without requiring larger chainrings, allowing riders to maintain high-speed efficiency while preserving climbing capability. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1443\" data-end=\"1648\"\u003eFlattop Chain Compatibility\u003cbr data-start=\"1474\" data-end=\"1477\"\u003eFully optimized for SRAM Flattop chains (D1 \/ E1), delivering quiet operation, reduced wear, and improved drivetrain longevity. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1650\" data-end=\"1908\"\u003eMultiple Terrain Options (Road to Gravel)\u003cbr data-start=\"1695\" data-end=\"1698\"\u003eFrom tight 10-28T road racing setups to 10-36T endurance and gravel configurations, the RED cassette adapts to performance road racing and mixed-surface riding alike. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"1910\" data-end=\"1913\"\u003e\n\u003ch3 data-section-id=\"12xlpaz\" data-start=\"1915\" data-end=\"1945\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul data-start=\"1947\" data-end=\"2492\"\u003e\n\u003cli data-section-id=\"11j7t1a\" data-start=\"1947\" data-end=\"1998\"\u003eDrivetrain Compatibility: SRAM AXS 12-speed\u003c\/li\u003e\n\u003cli data-section-id=\"p5y4g2\" data-start=\"1999\" data-end=\"2099\"\u003eCassette Range Options: 10-28T, 10-30T, 10-33T, 10-36T \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1xf6v7q\" data-start=\"2100\" data-end=\"2129\"\u003eDriver Body: XDR only\u003c\/li\u003e\n\u003cli data-section-id=\"1ge86v5\" data-start=\"2130\" data-end=\"2185\"\u003eConstruction: One-piece machined steel (X-DOME)\u003c\/li\u003e\n\u003cli data-section-id=\"17u0nfd\" data-start=\"2186\" data-end=\"2213\"\u003eCog Material: Steel\u003c\/li\u003e\n\u003cli data-section-id=\"bkdixy\" data-start=\"2214\" data-end=\"2263\"\u003eChain Compatibility: SRAM Flattop D1 \/ E1\u003c\/li\u003e\n\u003cli data-section-id=\"ic09vg\" data-start=\"2264\" data-end=\"2329\"\u003eShifting Technology: Optimized AXS electronic shift ramps\u003c\/li\u003e\n\u003cli data-section-id=\"vxfcsi\" data-start=\"2330\" data-end=\"2407\"\u003eUse Case: Road racing, endurance, all-road, gravel performance builds\u003c\/li\u003e\n\u003cli data-section-id=\"yl1vfo\" data-start=\"2408\" data-end=\"2492\"\u003eWeight: Approx. 180g (varies by range)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SRAM","offers":[{"title":"Silver \/ 10-28","offer_id":49134290436263,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ 10-30","offer_id":49134290469031,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ 10-33","offer_id":49134290501799,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ 10-36","offer_id":49134290534567,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Rainbow \/ 10-28","offer_id":49134290567335,"sku":null,"price":450.0,"currency_code":"USD","in_stock":true},{"title":"Rainbow \/ 10-30","offer_id":49134290600103,"sku":null,"price":450.0,"currency_code":"USD","in_stock":true},{"title":"Rainbow \/ 10-33","offer_id":49134290632871,"sku":null,"price":450.0,"currency_code":"USD","in_stock":true},{"title":"Rainbow \/ 10-36","offer_id":49134290665639,"sku":null,"price":450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0740\/1937\/3223\/files\/sramrede1-cassette.png?v=1777486415","url":"https:\/\/imaginarybikeworks.com\/products\/sram-red-e1-cassette","provider":"Imaginary-Bikeworks","version":"1.0","type":"link"}