{"product_id":"shimano-grx-fc-rx820-12-speed-gravel-chainset-48-31-hollowtech-ii-compatible","title":"Shimano GRX FC-RX820 12-Speed Gravel Chainset 48\/31 HollowTech II Compatible","description":"\u003cp\u003eThe Shimano GRX FC-RX820 chainset is engineered specifically for gravel enthusiasts seeking a reliable and efficient drivetrain. Its gravel-specific ergonomics and optimized gearing options allow riders to tackle mixed terrains with confidence and ease. The HollowTech II technology ensures a smooth and stable ride, while its lightweight anodized aluminium crank arms and chainrings provide durability without unnecessary weight.\u003c\/p\u003e\n\n\u003cp\u003eThis 12-speed chainset is compatible with 12-speed Hyperglide+ chains and designed to fit HollowTech II bottom bracket cups, making it a seamless upgrade for your gravel bike. The 4-arm, 110mm bolt circle diameter design enhances rigidity and power transfer, perfect for demanding off-road conditions and varied riding styles.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It’s Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOptimized gearing for mixed terrains and gravel riding\u003c\/li\u003e\n  \u003cli\u003eDurable, lightweight construction for long-lasting performance\u003c\/li\u003e\n  \u003cli\u003eQuiet and stable drivetrain operation\u003c\/li\u003e\n  \u003cli\u003eCompatibility with 12-speed Hyperglide+ chains and HollowTech II bottom brackets\u003c\/li\u003e\n  \u003cli\u003eReliable power transfer with 4-arm, 110mm bolt circle diameter design\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat It’s NOT Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eUse with non-HollowTech II bottom brackets\u003c\/li\u003e\n  \u003cli\u003eCompatibility with chains other than 12-speed Hyperglide+\u003c\/li\u003e\n  \u003cli\u003eRiding styles that require single-speed or non-gravel specific chainsets\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this chainset compatible with my existing bottom bracket?\u003c\/strong\u003e\u003cbr\u003eThe Shimano GRX FC-RX820 is designed to work with HollowTech II type bottom bracket cups. Ensure your bike uses this standard for compatibility.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this chainset with other chain types?\u003c\/strong\u003e\u003cbr\u003eIt is optimized for 12-speed Hyperglide+ chains, so using other chain types may affect performance and drivetrain longevity.\u003c\/p\u003e","brand":"Shimano GRX","offers":[{"title":"Grey \/ 48 \/ 31 teeth \/ 165 mm","offer_id":47380189708463,"sku":"FCRX8202A81","price":233.2,"currency_code":"GBP","in_stock":true},{"title":"Grey \/ 48 \/ 31 teeth \/ 160 mm","offer_id":47380189741231,"sku":"FCRX8202M81","price":233.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/fcrx82024831_78a55980-e5c2-4b13-8081-34bacc4fc7ea.jpg?v=1787135272","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/shimano-grx-fc-rx820-12-speed-gravel-chainset-48-31-hollowtech-ii-compatible","provider":"Swinnerton Cycles","version":"1.0","type":"link"}