{"product_id":"shimano-grx-rd-rx825-di2-rear-derailleur-12-speed-long-cage-with-clutch-for-2x-blk","title":"Shimano GRX RD-RX825 Di2 12-Speed 2x Long Cage Clutch Black Rear Derailleur","description":"\u003cp\u003eThe Shimano GRX RD-RX825 is a \u003cstrong\u003e12-speed Di2 gravel derailleur for 2x drivetrains\u003c\/strong\u003e, with a built-in wireless unit and charging port. Shadow RD+ with an ON\/OFF switch keeps the chain quiet on rough terrain.\u003c\/p\u003e\n\u003cp\u003eIt works with \u003cstrong\u003e11-34t and 11-36t cassettes\u003c\/strong\u003e, has 40t of capacity, supports Full or Semi-Synchronized shift modes and uses Shimano rear direct mount.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eGravel riders on GRX Di2 2x12.\u003c\/li\u003e\n\u003cli\u003eRiders replacing an RX825.\u003c\/li\u003e\n\u003cli\u003eNot for mechanical shifters.\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\u003eSystem:\u003c\/strong\u003e Shimano road Di2 12-speed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCassette:\u003c\/strong\u003e 11-34t or 11-36t.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount:\u003c\/strong\u003e Shimano rear direct mount.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eIntegrated wireless and charging.\u003c\/strong\u003e Compact design with switch and port built in.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGravel-tuned clutch with switch.\u003c\/strong\u003e ON for gravel, OFF for smooth roads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSynchro shifting.\u003c\/strong\u003e Full or Semi-Synchronized modes.\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 Di2 gravel shifting with clutch control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTradeoffs:\u003c\/strong\u003e Di2 only; 36t max.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat makes it different:\u003c\/strong\u003e GRX's electronic 2x derailleur.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eVictory's Take\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eWe build GRX Di2 for gravel riders who want electronic precision. Victory Bicycle Studio can install and configure it.\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 GRX RD-RX825 Di2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivetrain speeds:\u003c\/strong\u003e 12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivetrain:\u003c\/strong\u003e 2x\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop sprocket:\u003c\/strong\u003e 11t\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow sprocket:\u003c\/strong\u003e 34t–36t\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChain wrap capacity:\u003c\/strong\u003e 40t\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCage length:\u003c\/strong\u003e Long\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount:\u003c\/strong\u003e Shimano rear direct mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShifter compatibility:\u003c\/strong\u003e Shimano road Di2\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 IRDRX825A\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shimano","offers":[{"title":"Default Title","offer_id":53546083549491,"sku":"IRDRX825A","price":445.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0981\/3685\/0739\/files\/f3bef77c5c23e66933967c3c0902f39351885605.jpg?v=1782346441","url":"https:\/\/victorybicyclestudio.com\/products\/shimano-grx-rd-rx825-di2-rear-derailleur-12-speed-long-cage-with-clutch-for-2x-blk","provider":"Victory Bicycle Studio","version":"1.0","type":"link"}