{"product_id":"shimano-deore-xt-rd-m8100-sgs-12-speed-shadow-rear-bike-derailleur-black","title":"Shimano Deore XT RD-M8100-SGS 12-Speed Shadow+ Rear Bike Derailleur - Black","description":"\u003cp\u003eDeveloped for wide-range one-by-twelve mountain bike drivetrains, the RD-M8100-SGS manages a 10-51T cassette while maintaining fast, controlled shifts across the range. Larger 13-tooth pulleys increase drivetrain efficiency and improve chain management on technical trails.\u003c\/p\u003e\n\u003cp\u003eShadow RD+ places the mechanism close to the frame and uses a stabilising clutch to limit chain movement over rough ground. Reduced tension in the lowest gear and an integrated cage bumper help quieten the drivetrain when climbing and descending.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOptimised for Shimano 1x12-speed mountain bike drivetrains.\u003c\/li\u003e\n\u003cli\u003eLong SGS cage supports wide-range 10-51T cassettes.\u003c\/li\u003e\n\u003cli\u003eShadow RD+ clutch improves chain stability on rough terrain.\u003c\/li\u003e\n\u003cli\u003eHyperglide+ compatibility supports fast shifting under load.\u003c\/li\u003e\n\u003cli\u003eLarge 13-tooth pulleys improve chain management and drivetrain efficiency.\u003c\/li\u003e\n\u003cli\u003eLow-profile body reduces exposure to trail obstacles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\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 Deore XT M8100\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e RD-M8100-SGS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Rear Derailleur\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivetrain:\u003c\/strong\u003e 1x12 speed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Speeds:\u003c\/strong\u003e 12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Cassette Range:\u003c\/strong\u003e 10-51T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Capacity:\u003c\/strong\u003e 41T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePulley Size:\u003c\/strong\u003e 13T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTechnology:\u003c\/strong\u003e Shadow RD+, Hyperglide+ and Bump Stopper\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\u003eMounting:\u003c\/strong\u003e Conventional direct attachment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage Weight:\u003c\/strong\u003e 284g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shimano","offers":[{"title":"Grade A","offer_id":54341724307794,"sku":"Hal\/RD-M8100#A","price":74.89,"currency_code":"GBP","in_stock":true},{"title":"Grade B+","offer_id":54341724340562,"sku":"Hal\/RD-M8100#B","price":99.79,"currency_code":"GBP","in_stock":false},{"title":"Grade C+","offer_id":54341724373330,"sku":"Hal\/RD-M8100#C","price":88.59,"currency_code":"GBP","in_stock":false},{"title":"Grade D+","offer_id":54341724406098,"sku":"Hal\/RD-M8100#D","price":77.29,"currency_code":"GBP","in_stock":false},{"title":"NEW","offer_id":54341724438866,"sku":"Hal\/RD-M8100#NEW","price":107.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/8844\/7058\/files\/RD-M8100_20a.jpg?v=1787302134","url":"https:\/\/www.tlx.co.uk\/products\/shimano-deore-xt-rd-m8100-sgs-12-speed-shadow-rear-bike-derailleur-black","provider":"TLX","version":"1.0","type":"link"}