Shimano GRX FC-RX820 1x12-speed Crank

The new GRX FC-RX820-1 HOLLOWTECH II 1 x 12-speed crankset offers the perfect synthesis of low weight and high efficiency for riding on mixed terrain. The gear ratio options cater to the special requirements of gravel and ensure a consistent rhythm with tighter gear steps.

For your riding freedom: the Gravel GRX 1x12-speed FC-RX820-1 crank

The SHIMANO FC-RX820-1 crankset combines durability, low weight, protection against mud and numerous gear ratio options to meet the different riding requirements of mixed terrain. By combining a 10-45 or 10-51 cassette with 40-, 42-, 44- and 46-tooth chainrings, there is plenty of choice between narrower gear steps or an ultimate range. The FC-RX820-1 is available with crank arm lengths of 160, 165, 170, 172.5 and 175 mm, offering fit options for riders of all sizes.

Both 1x12 options use Micro Spline, Shimano's lightweight aluminium freehub design that pairs seamlessly with a small 10-tooth sprocket and features smaller, more widely spaced teeth to reduce sprocket wear. The 1x12 gravel crankset is offered in three crank arm lengths, so you can choose the ideal Shimano GRX setup for your needs and riding style.

Features - Shimano GRX FC-RX820-1-12 | 1x12-speed crankset

• Optimum gear ratio for different surfaces and different riding styles
• Gear ratio tailored to gravel helps to maintain the riding rhythm even on uneven terrain with wider tyres
• Option with 10-45 and 10-51 cassettes for a variety of riding styles

Product features

• Application: Gravel, Cyclocross
• Groupset: GRX
• Model: FC-RX820-1
• Gradation: 40 teeth / 42 teeth
• Q-Factor: 151mm
• Housing width: 68 / 70mm
• Front gear steps: 1-speed
• Rear gear steps: 12-speed
• Mount: Hollowtech II
• Compatible chain: 12-speed HG
• 4-arm crank spider: Yes
• Bolt circle: 110mm
• Chainline: 49.7mm
• Recommended bottom bracket Pressfit: SM-BB72
• Recommended bottom bracket BSA: SM-BBR60

Material

• Crank arms: Aluminium, anodised
• Crank axle: Steel, plated
• Chainring: anodised aluminium