{"product_id":"shimano-31-crankset-45402","title":"Shimano GRX RX820 12-Speed 2x 48\/31 Crankset","description":"\u003cp\u003eShimano's latest gravel crankset provides optimal gearing for spirited group rides and aggressive racing.\u003c\/p\u003e\u003ch3\u003eUnstoppable and undroppable\u003c\/h3\u003e\u003cp\u003eThe Shimano FC-RX820-2 balances weight savings and optimal efficiency for mixed-terrain riding and racing.\u003c\/p\u003e\u003cp\u003eDouble chainring gearing caters to the segmented demands of gravel cycling, maintaining the tighter gear steps needed to maintain your position in the bunch.\u003c\/p\u003e\u003ch3\u003eProduct details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSmaller gear steps for cadence control on mixed terrain riding\u003c\/li\u003e\n\u003cli\u003eGravel-optimized gear ratios preserve riding rhythm on rough surfaces\u003c\/li\u003e\n\u003cli\u003eWider gear range\u003c\/li\u003e\n\u003cli\u003e17T range covers array of riding conditions\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\u003eHollowtech II\u003c\/strong\u003e - Balancing stiffness and power transfer against overall component weight is a chief concern for any crankarm design. Shimano's Hollowtech II technology integrates the bottom bracket axle with the right crankarm for more stiffness and weight savings to achieve a high-dimensional balance. Its 24mm diameter, outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer.\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\u003eMountain bike cranks\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\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRiding style\u003c\/th\u003e\n\u003ctd\u003eMountain\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\"\u003eLength\u003c\/th\u003e\n\u003ctd\u003e170mm (170mm, 31x48t), 172.5mm (172.5mm, 31x48t)\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\"\u003eBCD\u003c\/th\u003e\n\u003ctd\u003e110mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eChainline\u003c\/th\u003e\n\u003ctd\u003e46.9mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eOffset\u003c\/th\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCrank type\u003c\/th\u003e\n\u003ctd\u003eShimano Hollowtech II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eThreading\u003c\/th\u003e\n\u003ctd\u003e9\/16\"(15mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eSold by Atlanta Cycling in Atlanta, GA. Manufacturer part #45402.\u003c\/p\u003e","brand":"Shimano","offers":[{"title":"170mm, 31x48t \/ Black","offer_id":51670883467431,"sku":"5317597","price":280.0,"currency_code":"USD","in_stock":false},{"title":"172.5mm, 31x48t \/ Black","offer_id":51670883500199,"sku":"5317598","price":280.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/6076\/5863\/files\/shimano-31-crankset-black-1.jpg?v=1793114647","url":"https:\/\/www.atlantacycling.com\/products\/shimano-31-crankset-45402","provider":"Atlanta Cycling","version":"1.0","type":"link"}