{"product_id":"shimano-xt-rd-m8100-sgs-rear-derailleur","title":"Shimano XT RD-M8100-SGS Rear Derailleur","description":"\u003cdiv\u003e\n\u003cp\u003eThe \u003cstrong\u003eShimano XT RD-M8100-SGS Rear Derailleur\u003c\/strong\u003e sits at the core of Shimano's 12-speed 1x mountain drivetrain — built from aluminum, designed for riders who want XTR-tier shifting logic without the weight penalty of carrying a slack, imprecise derailleur through technical terrain. The SGS long cage handles cassettes up to 51T, making it well-suited to steep climbs and big-range setups.\u003c\/p\u003e\n\n\u003cp\u003eShimano's integrated stabilizer mechanism reduces chain slap and resists drops on rough, choppy trails — the kind of riding where an unsuppressed chain costs you momentum and focus. The 13T oversized pulleys improve chain efficiency and tracking across the full cassette range, while a cage bumper absorbs impact and keeps shifts quick even after hard landings. Tension management across the gear range is designed to keep engagement smooth in both the largest and smallest cogs, reducing that slack feeling in easier gears that plagues lesser derailleurs.\u003c\/p\u003e\n\n\u003ch3\u003eShimano XT RD-M8100-SGS Rear Derailleur Specs at a Glance\u003c\/h3\u003e\n\u003cul class=\"specs_at_a_glance\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 284g\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpeeds:\u003c\/strong\u003e 12-speed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Cassette:\u003c\/strong\u003e 10-51T\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePulley Size:\u003c\/strong\u003e 13T, sealed bearing, SGS cage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Shimano","offers":[{"title":"Black","offer_id":43520606502956,"sku":"IRDM8100SGS","price":145.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/7684\/9196\/files\/shimano-xt-rd-m8100-sgs-rear-derailleur-6133287.jpg?v=1771297270","url":"https:\/\/ricycles.com\/products\/shimano-xt-rd-m8100-sgs-rear-derailleur","provider":"RA Cycles","version":"1.0","type":"link"}