{"product_id":"shimano-grx-fc-rx820-1-12v-crankset-1","title":"Shimano GRX FC-RX820-1 12v crankset","description":"\u003cp\u003eThe SHIMANO FC-RX820-1 crank offers perfect balance through light weight, optimized efficiency, and a range of ratio options that meet the segmented needs of mixed-terrain riding. By pairing a 10-45D or 10-51D cassette with a 40D or 42D chainring, you will be able to choose closer, progressive ratios or the widest range. The FC-RX820-1 is available with 170, 172.5 and 175 mm crank lengths to provide an additional degree of customization.\u003c\/p\u003e\n\u003ch2\u003e\n\u003cbr\u003eTech spec\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSeries: GRX \n\u003c\/li\u003e\n\u003cli\u003eSprockets: 12 \n\u003c\/li\u003e\n\u003cli\u003eCompatible chain: 12-speed HG \n\u003c\/li\u003e\n\u003cli\u003eChain line: 49.7 mm \n\u003c\/li\u003e\n\u003cli\u003eChainsprocket: 110 mm \n\u003c\/li\u003e\n\u003cli\u003eSpider\/Arms: 4 \n\u003c\/li\u003e\n\u003cli\u003eSprocket combination: 40D, 42D \n\u003c\/li\u003e\n\u003cli\u003eQ-factor: 151 mm \n\u003c\/li\u003e\n\u003cli\u003eCrank length: 170 \/ 172.5 \/ 175 mm \n\u003c\/li\u003e\n\u003cli\u003eChainring guard: optional \n\u003c\/li\u003e\n\u003cli\u003eHOLLOWTECH II: ✔ \n\u003c\/li\u003e\n\u003cli\u003eHOLLOWTECH crank: ✔ \n\u003c\/li\u003e\n\u003cli\u003eCompatible Lower Bracket Type: External ✔ \n\u003c\/li\u003e\n\u003cli\u003eRecommended Lower Bracket: Threaded (regular SM-BBR60) \/ Press to Fit (SM-BB72) \n\u003c\/li\u003e\n\u003cli\u003eThreaded Lower Bracket Body Length: 68 \/ 70 mm \n\u003c\/li\u003e\n\u003cli\u003eCrank fixing screw included: ✔ \n\u003c\/li\u003e\n\u003cli\u003eReal weight: 637 g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n\u003cbr\u003eTechnologies\u003c\/h2\u003e\n\u003cdiv class=\"prd-technologies\"\u003e\n\n\u003cdiv\u003e\n\u003ch3\u003eHollowtech II\u003c\/h3\u003e\n\u003cp\u003eProviding the best balance of stiffness, strength, weight and rotating performance The concept of Hollowtech II technology is focused on producing a superior crankset which will maximize a rider’s power transfer. The rigidity of the crankset ensures pedaling efficiency while its weight, a key element of the crankset, you want light, aids in cycling longer distances over which the rider needs to pedal more. Naturally, Shimano strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank. Hollowtech technology is an ultra-lightweight hollow crankarm created by Shimano with the company’s own proprietary forging technology that also maintains rigidity. The addition of Hollowtech II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer. The Hollowtech II crankset has been developed by pursuing the optimum balance of stiffness \u0026amp; rotating performance in a lightweight and beautiful crankset design. High Precision Sealing Moreover, Hollowtech II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Shimano","offers":[{"title":"170mm - 40","offer_id":48058343129329,"sku":"IFCRX8201CXB0","price":262.17,"currency_code":"AUD","in_stock":true},{"title":"172.5mm - 40","offer_id":48058343162097,"sku":"IFCRX8201DXB0","price":200.19,"currency_code":"AUD","in_stock":true},{"title":"175mm - 40","offer_id":48058343194865,"sku":"IFCRX8201EXB0","price":184.59,"currency_code":"AUD","in_stock":true},{"title":"170mm - 42","offer_id":48058343227633,"sku":"IFCRX8201CXB2","price":282.23,"currency_code":"AUD","in_stock":true},{"title":"172.5mm - 42","offer_id":48058343260401,"sku":"IFCRX8201DXB2","price":282.23,"currency_code":"AUD","in_stock":true},{"title":"175mm - 42","offer_id":48058343293169,"sku":"IFCRX8201EXB2","price":282.23,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/1580\/4145\/files\/zm_20250716-104732.jpg?v=1776532135","url":"https:\/\/novasportsbikes.com\/products\/shimano-grx-fc-rx820-1-12v-crankset-1","provider":"Nova Sports Bikes","version":"1.0","type":"link"}