{"product_id":"shimano-grx-fc-rx820-2x12-speed-crankset-48-31t","title":"SHIMANO GRX FC-RX820 2x12-SPEED CRANKSET 48\/31T","description":"\u003ch3\u003eThe GRX FC-RX820-2 HOLLOWTECH II 2 x 12-speed crankset combines lightweight construction with exceptional efficiency for mixed terrain riding.\u003c\/h3\u003e\n\u003cp\u003ePurpose-built for gravel cycling, the dual chainring setup delivers tighter gear graduations that maintain smooth cadence across variable surfaces. The 48\/31T ratio provides versatile coverage for climbing and acceleration, while HOLLOWTECH II technology ensures durability without excess weight. Ideal for riders seeking responsive performance on unpredictable terrain.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGravel gear ratios preserve riding rhythm over rough surfaces with wider tires\u003c\/li\u003e\n\u003cli\u003eOptimum gearing for mixed terrains and riding styles\u003c\/li\u003e\n\u003cli\u003eWider range front system\u003c\/li\u003e\n\u003cli\u003e17T range covers array of riding conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecification\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse: \u003c\/strong\u003eGravel, Cyclocross\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGroup:\u003c\/strong\u003e GRX\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel: \u003c\/strong\u003eFC-RX820-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGradation:\u003c\/strong\u003e 48\/31T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ-Factor: \u003c\/strong\u003e151mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreaded BB shell width: \u003c\/strong\u003e68 \/ 70mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eGear front: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e2-speed \u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGear rear:\u003c\/strong\u003e 12-speed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Hollowtech II\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Chain:\u003c\/strong\u003e 12-speed HG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCD: \u003c\/strong\u003e110\/80mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChain line: \u003c\/strong\u003e47mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended BB Pressfit:\u003c\/strong\u003e SM-BB72\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended BB BSA:\u003c\/strong\u003e SM-BBR60\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCrank Arm Length\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e170mm\u003c\/li\u003e\n\u003cli\u003e172.5mm\u003c\/li\u003e\n\u003cli\u003e175mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMaterial\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrank arm:\u003c\/strong\u003e Aluminium Anodized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrank axle:\u003c\/strong\u003e Steel Plated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChainrings:\u003c\/strong\u003e Aluminium Anodized\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eColour\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSeries colour\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWeight\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eApprox. 721g - 172.5mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eContents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Shimano GRX 2x12-speed Crankset FC-RX820 48\/31T\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SHIMANO","offers":[{"title":"170mm","offer_id":57073795694967,"sku":"FCRX8202C81","price":219.99,"currency_code":"GBP","in_stock":true},{"title":"172.5mm","offer_id":57073795727735,"sku":"FCRX8202D81","price":219.99,"currency_code":"GBP","in_stock":true},{"title":"175mm","offer_id":57073795760503,"sku":"FCRX8202E81","price":219.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/2350\/2370\/files\/ShimanoGRXFC-RX8202x12-speedCrank.avif?v=1778083007","url":"https:\/\/www.allterraincycles.co.uk\/products\/shimano-grx-fc-rx820-2x12-speed-crankset-48-31t","provider":"allterraincycles","version":"1.0","type":"link"}