{"product_id":"shimano-grx-rx820-12-speed-rear-derailleur-45406","title":"Shimano GRX RX820 12-Speed Rear Derailleur","description":"\u003cp\u003eA GRX rear derailleur for enhanced chain security and quieter shifting for gravel riding.\u003c\/p\u003e\u003ch3\u003eUnstoppable and undroppable\u003c\/h3\u003e\u003cp\u003eThe RD-RX820 is compatible with 11-34T and 11-36T 12-speed cassettes, providing a wide gear range so you can spin a comfortable cadence no matter the terrain type.\u003c\/p\u003e\u003cp\u003eThe Shimano GRX 12-speed rear derailleur also features an integrated chain stabilizer that delivers quieter shifting and more secure chain management during rough rides. And the chain tensioner has an On\/Off switch for outings on smooth surfaces.\u003c\/p\u003e\u003ch3\u003eProduct details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSilent and secure rear shifting on rough terrain\u003c\/li\u003e\n\u003cli\u003eAdjustable chain stabilizer prevents chain slap and drops\u003c\/li\u003e\n\u003cli\u003eShimano Shadow RD+ technology\u003c\/li\u003e\n\u003cli\u003eOn\/Off stabilizer switch matches terrain\u003c\/li\u003e\n\u003cli\u003eMaximum front chainring difference: 17T\u003c\/li\u003e\n\u003cli\u003eTop sprocket: Max. 11T\/Min. 11T\u003c\/li\u003e\n\u003cli\u003eLow sprocket: Max. 36T\/Min. 34T\u003c\/li\u003e\n\u003cli\u003eTotal capacity: 42T\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHighlights\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eShimano GRX\u003c\/strong\u003e - Shimano GRX was designed from the ground up for gravel adventure. With its gravel-specific ergonomics, optimized gearing options, rugged reliability, and quiet, stable drivetrain, GRX sets itself apart from the rest of the component world.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShadow RD+\u003c\/strong\u003e - Shimano's Shadow RD+ technology uses an adjustable rear derailleur clutch to reduce chain slap over rough terrain. This simple chain drop solution is lighter and more efficient than roller bearing chain management devices.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eKey specs\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCategory\u003c\/th\u003e\n\u003ctd\u003eBike derailleurs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eShimano\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eManufacturer part #\u003c\/th\u003e\n\u003ctd\u003eIRDRX820\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCage\u003c\/th\u003e\n\u003ctd\u003eMiddle cage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSpeed\u003c\/th\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eLargest cog\u003c\/th\u003e\n\u003ctd\u003e36t\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eSold by Atlanta Cycling in Atlanta, GA. Manufacturer part #45406.\u003c\/p\u003e","brand":"Shimano","offers":[{"title":"Middle cage \/ Black","offer_id":51670883762343,"sku":"5317605","price":145.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/6076\/5863\/files\/shimano-grx-rx820-12-speed-rear-derailleur-black-1.jpg?v=1793114651","url":"https:\/\/www.atlantacycling.com\/products\/shimano-grx-rx820-12-speed-rear-derailleur-45406","provider":"Atlanta Cycling","version":"1.0","type":"link"}