{"product_id":"sram-apex-eagle-rear-derailleur-12-speed-long-cage-52t-max-black-d1","title":"SRAM Apex Eagle D1 12-Speed Long Cage 52t Max Black Rear Derailleur","description":"\u003cp\u003eThe SRAM Apex Eagle D1 is a \u003cstrong\u003ecable-actuated 12-speed 1x rear derailleur for Eagle cassettes up to 52t\u003c\/strong\u003e. It brings SRAM's mountain-bike clutch and X-HORIZON parallelogram to an entry-level price tier, which makes it a common choice for wide-range gravel builds and budget mountain bike drivetrains.\u003c\/p\u003e\n\u003cp\u003eIt mounts to a \u003cstrong\u003estandard derailleur hanger\u003c\/strong\u003e, works with SRAM 12-speed mechanical Apex and Eagle shifters, and uses an Eagle 12-speed chain. The long cage has a listed 42t chain wrap capacity, sized for a single chainring with a 10–50t or 10–52t cassette.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eRiders building or repairing a 1x 12-speed drivetrain around a 50t or 52t Eagle cassette.\u003c\/li\u003e\n\u003cli\u003eGravel and mountain riders who want clutch chain control without electronic shifting.\u003c\/li\u003e\n\u003cli\u003eOwners of Apex Eagle or mechanical Eagle shifters needing a replacement derailleur.\u003c\/li\u003e\n\u003cli\u003eConsider a different derailleur if your frame uses the UDH Full Mount T-Type interface, or you run a 2x drivetrain.\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\u003eCassette size:\u003c\/strong\u003e Built for Eagle cassettes with 50t or 52t large cogs; 52t is the listed maximum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShifter pull:\u003c\/strong\u003e SRAM X-Actuation 12-speed mechanical. It will not index with road 12-speed AXS or Shimano shifters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount:\u003c\/strong\u003e 10x1 standard hanger mount, not T-Type Full Mount.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eRoller Bearing Clutch.\u003c\/strong\u003e The clutch adds tension to the cage pivot so the chain stays quiet and on the cassette over rough ground, which matters most on a 1x drivetrain with no front derailleur to help.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eX-HORIZON parallelogram.\u003c\/strong\u003e Movement is limited to the horizontal plane, which SRAM says prevents ghost shifting and lowers shift force at the lever.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCage Lock.\u003c\/strong\u003e The cage can be locked forward to take tension off the chain, which makes wheel removal and chain installation simpler.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLong cage, 42t capacity.\u003c\/strong\u003e Enough wrap for a single ring paired with a 10–52t Eagle cassette.\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 Clutch, Cage Lock and 52t range at the Apex price tier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTradeoffs:\u003c\/strong\u003e Heavier steel-and-alloy construction than higher Eagle tiers; standard hanger only, so not for T-Type frames.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat makes it different:\u003c\/strong\u003e An Eagle-range mechanical derailleur that bridges SRAM's road Apex group and its mountain drivetrains.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eVictory's Take\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eWe see the Apex Eagle as the practical way to get a 52t cassette on a 1x gravel or trail build. Victory Bicycle Studio can confirm shifter, chain and cassette compatibility before you order.\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 SRAM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Apex Eagle (D1)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivetrain speeds:\u003c\/strong\u003e 12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLargest cog:\u003c\/strong\u003e 52t\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChain wrap capacity:\u003c\/strong\u003e 42t\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCage length:\u003c\/strong\u003e Long\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 SRAM X-Actuation (12-speed mechanical Apex\/Eagle)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChain:\u003c\/strong\u003e Eagle 12-speed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 00.7518.178.000\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SRAM","offers":[{"title":"Default Title","offer_id":53531486978355,"sku":"00.7518.178.000","price":140.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0981\/3685\/0739\/files\/a440945755f8cac996fae0dcac4bfe860364838e.jpg?v=1782158183","url":"https:\/\/victorybicyclestudio.com\/products\/sram-apex-eagle-rear-derailleur-12-speed-long-cage-52t-max-black-d1","provider":"Victory Bicycle Studio","version":"1.0","type":"link"}