{"product_id":"shimano-xt-rd-m8100-gs-rear-derailleurs","title":"Shimano Deore XT RD-M8100 \/ RD-M8120 12-Speed Rear Derailleur","description":"\u003cp\u003eThe Shimano Deore XT RD-M8100 is a \u003cstrong\u003e12-speed HYPERGLIDE+ mountain derailleur\u003c\/strong\u003e with Shadow RD+, a bumper on the pulley cage and a large 13t pulley. Chain and derailleur tension drop in low gear for a quieter drivetrain.\u003c\/p\u003e\n\u003cp\u003eThis listing offers the \u003cstrong\u003eRD-M8100-SGS long cage for 1x\u003c\/strong\u003e, the RD-M8100-GS medium cage, and the \u003cstrong\u003eRD-M8120-SGS long cage for 2x\u003c\/strong\u003e. Shimano lists 45t or 51t largest cogs and 41t or 45t capacity across them.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTrail riders on XT 12-speed.\u003c\/li\u003e\n\u003cli\u003eRiders choosing between 1x and 2x XT.\u003c\/li\u003e\n\u003cli\u003eNot for SRAM or 11-speed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eWhat to Look For\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersion:\u003c\/strong\u003e M8100-SGS for 1x; M8120-SGS for 2x; M8100-GS medium.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCassette:\u003c\/strong\u003e HYPERGLIDE+ 12-speed up to 51t.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e Check stock by version.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eHYPERGLIDE+.\u003c\/strong\u003e Fast, shockless shifting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCage bumper and 13t pulley.\u003c\/strong\u003e Absorb chain impact; improve efficiency.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShadow RD+.\u003c\/strong\u003e Reduces chain slap.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eRider Intent Summary\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBiggest strengths:\u003c\/strong\u003e XT 12-speed with 1x and 2x versions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTradeoffs:\u003c\/strong\u003e Shimano HG+ only.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat makes it different:\u003c\/strong\u003e Covers every XT 12-speed configuration in one listing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eVictory's Take\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eWe think XT M8100 is the benchmark mechanical 12-speed. Victory Bicycle Studio can confirm which version suits your crank.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Shimano\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Deore XT RD-M8100 \/ RD-M8120\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivetrain speeds:\u003c\/strong\u003e 12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersions:\u003c\/strong\u003e M8100-SGS long 1x; M8100-GS medium; M8120-SGS long 2x\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLargest cog:\u003c\/strong\u003e 45t \/ 51t depending on version\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChain wrap capacity:\u003c\/strong\u003e 41t \/ 45t depending on version\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount type:\u003c\/strong\u003e 10x1 standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShifter compatibility:\u003c\/strong\u003e Shimano mountain\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePulley:\u003c\/strong\u003e 13t\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 284 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart numbers:\u003c\/strong\u003e IRDM8100SGS, IRDM8100GS, IRDM8120SGS\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shimano","offers":[{"title":"Long \/ 12-Speed 1X","offer_id":53538471969075,"sku":"IRDM8100SGS","price":145.0,"currency_code":"USD","in_stock":true},{"title":"Medium \/ 12-Speed","offer_id":53538472001843,"sku":"IRDM8100GS","price":145.0,"currency_code":"USD","in_stock":false},{"title":"Long \/ 12-Speed 2X","offer_id":53538472034611,"sku":"IRDM8120SGS","price":145.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0981\/3685\/0739\/files\/27dbe1e3e30f6eb4ad2ebd7299474b9b87b3b842.jpg?v=1782261405","url":"https:\/\/victorybicyclestudio.com\/products\/shimano-xt-rd-m8100-gs-rear-derailleurs","provider":"Victory Bicycle Studio","version":"1.0","type":"link"}