{"product_id":"sram-rival-xg-1250-cassette-12-speed-10-36t-xdr","title":"SRAM Rival XG-1250 Cassette — 12-Speed, 10-36T, XDR","description":"\u003cp\u003e\u003cstrong\u003eTwelve speeds, a 10-tooth start, and 360% of range.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe XG-1250 is what makes X-Range gearing work. Starting at a 10-tooth cog instead of an 11 lets SRAM use smaller chainrings without giving up top-end speed — which is the whole reason a 48\/35 crank outruns a 50\/34, and the reason a 42T ring is enough for gravel.\u003c\/p\u003e\n\n\u003cp\u003eCog sizes: \u003cstrong\u003e10, 11, 12, 13, 15, 17, 19, 21, 24, 28, 32, 36.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch4\u003eRead the spacing, not just the range\u003c\/h4\u003e\n\n\u003cp\u003eThe useful thing about this cassette isn't the 36 at the bottom. It's where the gaps are.\u003c\/p\u003e\n\n\u003cp\u003eThe first four cogs step one tooth at a time — 10, 11, 12, 13. That's the range you live in on flat road and fast group riding, and single-tooth steps mean you can actually hold a cadence instead of picking between too hard and too easy.\u003c\/p\u003e\n\n\u003cp\u003eThe jumps open up as the cogs get bigger, which is exactly where you want them. Nobody is fine-tuning cadence at 32 teeth on a 12% grade — they just want a gear that lets them keep turning the pedals.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch4\u003eWhat this gives you on the bike\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eOn a 2x 48\/35 setup:\u003c\/strong\u003e 48x10 at the top down to 35x36 at the bottom. That's a higher top gear than a traditional 50\/34 with an 11-tooth cog, and a lower bottom gear than most compact road setups ever offered. Close to 500% total range from a road drivetrain.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eOn a 1x 42T setup:\u003c\/strong\u003e 42x10 down to 42x36 — 360% of range, with a top gear that holds pace on pavement and a bottom gear near 1.2:1.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIf you need lower than that,\u003c\/strong\u003e this isn't your cassette. A 36-tooth large cog is the practical limit for a standard road AXS rear derailleur. Riders wanting a genuinely low climbing gear for loaded gravel or steep sustained dirt want an XPLR cassette with a 44 or 46 large cog, which requires an XPLR rear derailleur to match.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch4\u003eYou need an XDR driver body\u003c\/h4\u003e\n\n\u003cp\u003eThis is not a preference. It's physics.\u003c\/p\u003e\n\n\u003cp\u003eA 10-tooth cog is smaller than the diameter of a standard HG freehub body — the cog can't fit over it. SRAM's answer is XDR, a driver body designed specifically for cassettes with fewer than 11 teeth on the small cog.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCheck your rear hub before ordering.\u003c\/strong\u003e If your wheels have an HG or Shimano-style freehub, this cassette will not mount, and there is no adapter that changes that. Most wheel manufacturers sell an XDR driver body as a replaceable part for their hubs — it's usually a ten-minute swap, but you have to buy the right one for your specific hub.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eXDR vs XD:\u003c\/strong\u003e they look similar and they're not the same. XDR is 1.85mm longer and built for road hub spacing. If you already have an XD driver from a mountain wheelset, that won't work here either.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch4\u003eFULL PIN construction\u003c\/h4\u003e\n\n\u003cp\u003eRather than machining the cassette from a solid billet, SRAM stamps the cogs individually and pins them together — 123 stainless steel pins holding the stack. It's lighter than a solid cassette at this price and stiffer than a riveted spider design.\u003c\/p\u003e\n\n\u003cp\u003eThe open architecture between cogs also sheds mud instead of packing it, which is why this cassette works for gravel as well as road. A packed cassette shifts badly and wears fast.\u003c\/p\u003e\n\n\u003cp\u003eNickel chrome plating on the cogs adds hardness for a longer service life and runs quieter under the chain.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch4\u003eYou will need a SRAM Flattop chain\u003c\/h4\u003e\n\n\u003cp\u003eSRAM's 12-speed road and gravel drivetrains use \u003cstrong\u003eFlattop\u003c\/strong\u003e chains, a different design from standard 12-speed chains. A Shimano 12-speed chain will not work. A SRAM Eagle chain will not work. A generic 12-speed chain will not work.\u003c\/p\u003e\n\n\u003cp\u003eCompatible: \u003cstrong\u003eSRAM Road Flattop D1 or Road Flattop E1.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch4\u003eWhat you'll still need\u003c\/h4\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAn XDR driver body\u003c\/strong\u003e on your rear hub — verify before ordering\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSRAM Road Flattop chain\u003c\/strong\u003e, D1 or E1\u003c\/li\u003e\n\u003cli\u003eA 12-speed AXS rear derailleur rated to 36T\u003c\/li\u003e\n\u003cli\u003eA cassette lockring tool — the standard 12-spline type\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDriver body:\u003c\/strong\u003e XDR only. Not compatible with HG or XD.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeeds:\u003c\/strong\u003e 12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivetrain:\u003c\/strong\u003e 1x or 2x\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax cog:\u003c\/strong\u003e 36T — confirm your rear derailleur is rated for it\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChain:\u003c\/strong\u003e SRAM Road Flattop D1 or Road Flattop E1 only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e CS-XG-1250-D1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGearing:\u003c\/strong\u003e 10-36T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCog sizes:\u003c\/strong\u003e 10, 11, 12, 13, 15, 17, 19, 21, 24, 28, 32, 36\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeeds:\u003c\/strong\u003e 12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal range:\u003c\/strong\u003e 360%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e FULL PIN — stamped cogs, 123 stainless pins\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Nickel chrome plated, silver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDriver body interface:\u003c\/strong\u003e XDR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivetrain configuration:\u003c\/strong\u003e 1x, 2x\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChain technology:\u003c\/strong\u003e Road Flattop D1, Road Flattop E1\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch4\u003eInstallation\u003c\/h4\u003e\n\n\u003cp\u003eStandard cassette install with one caution: XDR driver bodies are aluminum on most hubs, and an over-torqued lockring will bite into them. Use a torque wrench and follow the value in SRAM's documentation. A little anti-seize on the driver splines makes removal much easier a year from now.\u003c\/p\u003e\n\n\u003cp\u003eReplace the chain at the same time if the old one is worn. A worn chain on a new cassette will chew the new cogs quickly, and you'll be buying both again.\u003c\/p\u003e\n\n\u003cp\u003eFull documentation is available in \u003ca href=\"https:\/\/www.sram.com\/en\/service\/models\/cs-xg-1250-d1\" target=\"_blank\" rel=\"noopener\"\u003eSRAM's service hub for this model\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch4\u003eOE product information\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eNot intended for retail sale.\u003c\/strong\u003e This is original-equipment product supplied for dealer service, warranty replacement, and complete-bike build applications.\u003c\/p\u003e\n\n\u003cp\u003eOE product is the same component that ships on complete bikes — identical specification, identical performance. What differs is how it's supplied:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003ePlain bulk or poly packaging rather than a retail box\u003c\/li\u003e\n\u003cli\u003eNo printed manuals or quick-start guides — all documentation is available free from SRAM's service hub, linked above\u003c\/li\u003e\n\u003cli\u003eNo retail hang tags or display materials\u003c\/li\u003e\n\u003cli\u003eSmall-parts and hardware content may differ from the retail pack\u003c\/li\u003e\n\u003cli\u003eComponents may show minor handling marks from bulk packing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWarranty.\u003c\/strong\u003e SRAM's consumer warranty program does not apply to original-equipment components. Warranty and defect claims on this item are administered by State Bicycle Co. Contact our support team with your order number. Wear is not a defect — cassettes are a consumable.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\u003csmall\u003e\u003cem\u003eOriginal equipment service item. Supplied in OE packaging for dealer service, warranty replacement, and complete-bike build applications; not a retail-packaged consumer product and not intended for retail sale. SRAM consumer warranty does not apply to original-equipment components — warranty administration on this item is provided by State Bicycle Co. Requires an XDR driver body; not compatible with HG or XD freehubs. SRAM, Rival, AXS, XG, XDR, X-Range, FULL PIN, and Flattop are trademarks of SRAM LLC. State Bicycle Co. is not affiliated with or endorsed by SRAM LLC. Specifications subject to change without notice.\u003c\/em\u003e\u003c\/small\u003e\u003c\/p\u003e","brand":"SRAM","offers":[{"title":"Default Title","offer_id":44165770575959,"sku":"751503808050","price":145.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0232\/3305\/files\/SRAMRivalXG-1250Cassette_12-Speed_10-36T_XDR-resized.png?v=1786727027","url":"https:\/\/www.statebicycle.com\/products\/sram-rival-xg-1250-cassette-12-speed-10-36t-xdr","provider":"State Bicycle Co.","version":"1.0","type":"link"}