{"product_id":"shimano-grx-fc-rx820-1-1x-crankset","title":"Shimano GRX FC-RX820-1 1x Crankset","description":"\u003cstyle\u003e\n.oc{--line:#e6e6e2;--soft:#f7f7f5;--muted:#5f6368;--radius:18px;--shadow:0 10px 28px rgba(0,0,0,.07);font-family:Inter,system-ui,-apple-system,\"Segoe UI\",sans-serif;color:#111;line-height:1.55}\n.oc *{box-sizing:border-box}\n.oc h1,.oc h2,.oc h3{letter-spacing:-.035em;line-height:1.05;margin:0 0 1rem}\n.oc h1{font-size:clamp(2.4rem,7vw,5.5rem)}\n.oc h2{font-size:clamp(1.7rem,3.5vw,3rem)}\n.oc h3{font-size:clamp(1.2rem,1.8vw,1.6rem)}\n.oc .eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:.78rem;font-weight:700;color:#777;margin:0 0 .8rem}\n.oc .hero{text-align:center;padding:clamp(2.5rem,6vw,5rem) clamp(1rem,4vw,3rem);background:linear-gradient(180deg,#fff 0%,#f8f8f5 100%)}\n.oc .hero .lede{max-width:820px;margin:0 auto;font-size:clamp(1.05rem,1.8vw,1.4rem);color:var(--muted)}\n.oc .section{padding:clamp(2rem,5vw,4.5rem) clamp(1rem,4vw,3rem)}\n.oc .soft{background:var(--soft)}\n.oc .intro{max-width:820px;margin:0 auto 2rem;text-align:center}\n.oc .intro p{color:var(--muted);font-size:clamp(1rem,1.5vw,1.2rem)}\n.oc .grid{display:grid;gap:clamp(1rem,2vw,1.6rem);grid-template-columns:repeat(auto-fit,minmax(240px,1fr));max-width:1300px;margin:0 auto}\n.oc .card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}\n.oc .card .body{padding:1.2rem 1.4rem}\n.oc .card .body p{margin:.4rem 0 0;color:var(--muted)}\n.oc .stat{padding:1.6rem 1.4rem;display:flex;flex-direction:column;justify-content:flex-end;min-height:150px}\n.oc .stat strong{font-size:clamp(1.6rem,3.2vw,2.6rem);line-height:1;letter-spacing:-.04em}\n.oc .stat span{color:var(--muted);margin-top:.5rem;font-size:.95rem}\n.oc .spec-grid{display:grid;gap:clamp(1rem,2vw,1.6rem);grid-template-columns:repeat(auto-fit,minmax(300px,1fr));max-width:1300px;margin:0 auto}\n.oc .spec-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.2rem 1.5rem}\n.oc .spec-row{display:grid;grid-template-columns:130px 1fr;gap:1rem;padding:.8rem 0;border-top:1px solid var(--line)}\n.oc .spec-row:first-of-type{border-top:0}\n.oc .spec-row dt{font-weight:800;margin:0}\n.oc .spec-row dd{margin:0;color:#666}\n.oc dl{margin:0}\n@media(max-width:620px){.oc .spec-row{grid-template-columns:1fr;gap:.2rem}}\n\u003c\/style\u003e\u003cdiv class=\"oc\"\u003e\n\u003cheader class=\"hero\"\u003e\u003cp class=\"eyebrow\"\u003eGRX 1x12 gravel crankset\u003c\/p\u003e\n\u003ch1\u003eShimano GRX FC-RX820-1 1x Crankset\u003c\/h1\u003e\n\u003cp class=\"lede\"\u003eA single-ring GRX crankset for simple, quiet 1x gravel builds, designed to pair with Shimano's 10-45T and 10-51T 12-speed cassettes. Tooth profiles help hold the chain on rough descents.\u003c\/p\u003e\u003c\/header\u003e\u003csection class=\"section\"\u003e\u003cdiv class=\"grid\"\u003e\n\u003cdiv class=\"card stat\"\u003e\n\u003cstrong\u003e~644g\u003c\/strong\u003e\u003cspan\u003eApprox. weight (40T)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card stat\"\u003e\n\u003cstrong\u003e151mm\u003c\/strong\u003e\u003cspan\u003eQ-factor\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card stat\"\u003e\n\u003cstrong\u003e49.7mm\u003c\/strong\u003e\u003cspan\u003eChainline\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card stat\"\u003e\n\u003cstrong\u003e40-42T\u003c\/strong\u003e\u003cspan\u003eRing sizes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"section soft\"\u003e\u003cdiv class=\"intro\"\u003e\n\u003cp class=\"eyebrow\"\u003eHighlights\u003c\/p\u003e\n\u003ch2\u003eWhy we rate it\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"grid\"\u003e\n\u003carticle class=\"card\"\u003e\u003cdiv class=\"body\"\u003e\n\u003ch3\u003eBuilt for 1x\u003c\/h3\u003e\n\u003cp\u003eNarrow-wide style tooth profiles help keep the chain on the ring over washboard and rocky descents without a front derailleur.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/article\u003e\u003carticle class=\"card\"\u003e\u003cdiv class=\"body\"\u003e\n\u003ch3\u003ePairs with wide cassettes\u003c\/h3\u003e\n\u003cp\u003eDesigned around Shimano's 12-speed 10-45T and 10-51T cassettes for a big spread of gears.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/article\u003e\u003carticle class=\"card\"\u003e\u003cdiv class=\"body\"\u003e\n\u003ch3\u003eLight and stiff\u003c\/h3\u003e\n\u003cp\u003eHollowtech II arms keep the crank light while remaining stiff enough for hard efforts out of the saddle.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/article\u003e\u003carticle class=\"card\"\u003e\u003cdiv class=\"body\"\u003e\n\u003ch3\u003eTyre clearance\u003c\/h3\u003e\n\u003cp\u003eThe outboard chainline suits wide gravel tyres and modern frame designs.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/article\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"section\"\u003e\u003cdiv class=\"intro\"\u003e\n\u003cp class=\"eyebrow\"\u003eTech specs\u003c\/p\u003e\n\u003ch2\u003eSpecification\u003c\/h2\u003e\n\u003cp\u003eManufacturer specification. Details may change without notice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-grid\"\u003e\u003carticle class=\"spec-card\"\u003e\u003ch3\u003eSpecification\u003c\/h3\u003e\n\u003cdl\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdt\u003eModel code\u003c\/dt\u003e\n\u003cdd\u003eFC-RX820-1\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdt\u003eSeries\u003c\/dt\u003e\n\u003cdd\u003eGRX RX820 12-speed\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdt\u003eSpeeds\u003c\/dt\u003e\n\u003cdd\u003e1x12\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdt\u003eChainrings\u003c\/dt\u003e\n\u003cdd\u003e40T, 42T (44T and 46T rings also made)\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdt\u003eCrank lengths\u003c\/dt\u003e\n\u003cdd\u003e160 to 175mm (varies by ring)\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdt\u003eMount\u003c\/dt\u003e\n\u003cdd\u003e110mm 4-arm\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdt\u003eQ-factor\u003c\/dt\u003e\n\u003cdd\u003e151mm\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdt\u003eChainline\u003c\/dt\u003e\n\u003cdd\u003e49.7mm\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdt\u003eAxle\u003c\/dt\u003e\n\u003cdd\u003e24mm Hollowtech II\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003eApprox. 644g (40T)\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdt\u003eRecommended cassettes\u003c\/dt\u003e\n\u003cdd\u003eCS-M8100 10-45T or 10-51T (12-speed)\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003c\/dl\u003e\u003c\/article\u003e\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"section soft\"\u003e\u003cdiv class=\"intro\"\u003e\n\u003cp class=\"eyebrow\"\u003eOrdering\u003c\/p\u003e\n\u003ch2\u003eAvailable from The Cycle Collective\u003c\/h2\u003e\n\u003cp\u003eAvailable to order through The Cycle Collective in Dorking. For availability, setup or advice, call 0203 148 6764 or email hello@thecyclecollective.cc.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"Shimano","offers":[{"title":"160mm \/ 40T","offer_id":57355826004346,"sku":"FCRX8201MB0","price":229.99,"currency_code":"GBP","in_stock":false},{"title":"165mm \/ 40T","offer_id":57355826037114,"sku":"FCRX8201AB0","price":229.99,"currency_code":"GBP","in_stock":false},{"title":"170mm \/ 40T","offer_id":57355826069882,"sku":"FCRX8201CB0","price":229.99,"currency_code":"GBP","in_stock":false},{"title":"172.5mm \/ 40T","offer_id":57355826102650,"sku":"FCRX8201DB0","price":229.99,"currency_code":"GBP","in_stock":false},{"title":"175mm \/ 40T","offer_id":57355826135418,"sku":"FCRX8201EB0","price":229.99,"currency_code":"GBP","in_stock":false},{"title":"170mm \/ 42T","offer_id":57355826168186,"sku":"FC-RX820-1 42T 170mm","price":229.99,"currency_code":"GBP","in_stock":false},{"title":"172.5mm \/ 42T","offer_id":57355826200954,"sku":"FC-RX820-1 42T 172.5mm","price":229.99,"currency_code":"GBP","in_stock":false},{"title":"175mm \/ 42T","offer_id":57355826233722,"sku":"FC-RX820-1 42T 175mm","price":229.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0487\/4007\/3623\/files\/Shimano-GRX-FC-RX820-12-Speed-Single-Chainset.jpg?v=1791317059","url":"https:\/\/thecyclecollective.cc\/products\/shimano-grx-fc-rx820-1-1x-crankset","provider":"thecyclecollective.cc","version":"1.0","type":"link"}