Description
For your riding freedom: the Gravel GRX 2×12-speed FC-RX820-2 Crank 48/31T from Shimano
The SHIMANO FC-RX820-2 balances weight savings and optimal efficiency for mixed-terrain riding and racing. Double chainring gearing caters to the segmented demands of gravel cycling, maintaining the tighter gear steps needed to maintain your position in the bunch. The 2 x 12-speed crank utilizes a 48-31T chainring and comes in 170, 172.5, and 175mm crank arm lengths.
Gravel cycling is not meant to be overly complicated. The heart and soul of cycling’s drop bar, dirt road discipline is rooted in simplicity, inclusivity, and adventure. No ride is out of bounds. All are welcome to join. Gear should be functional and reliable but need not break the bank. That’s why whether you’re a grizzled gravel cycling veteran or brand new to the road (or trail) less traveled, you’ll appreciate the latest iteration of Shimano’s groundbreaking—and industry-first-gravel-specific GRX component group. Designed to help you get the most from your next unpaved adventure, RX820 delivers top-tier performance without an over-the-top price.
For riders seeking the best of both worlds, the new 2×12 RX820 UNDROPPABLE drivetrain is the choice. Utilizing a gravel-optimized 48/31 front chainring paired with an 11-34 or 11-36 cassette, this setup delivers an ultra-wide gear range so you can spin a comfortable cadence whether cruising the flats, smashing endless dirt road rollers, or tackling a massive backcountry climb.
This setup delivers precise mechanical shifting both front and rear and an integrated SHADOW PLUS chain stabilization for ultimate security over bumpy terrain. The gravel-specific 2×12 option maintains tighter rear cassette gear steps, ideal for subtle cadence changes during competitive racing and spirited weekend group rides. And the 2×12 setup seamlessly interfaces with most existing 700c wheels thanks to its use of the tried-and-true HG freehub body design.
Features – Shimano GRX FC-RX820-2-12 | 2×12-speed Crank | 48/31
- Gravel gear ratios preserve riding rhythm over rough surfaces with wider tires
- Optimum gearing for mixed terrains and riding styles
- Wider range front system
- 17T range covers array of riding conditions
Product features
- Use: Gravel, Cyclocross
- Group: GRX
- Model: FC-RX820-2
- Gradation: 48/31T
- Q-Factor: 151mm
- Threaded BB shell width: 68 / 70mm
- Gear front: 2-speed
- Gear rear: 12-speed
- Construction: Hollowtech II
- Compatible Chain: 12-speed HG
- PCD: 110/80mm
- Chain line: 47mm
- Recommended BB Pressfit: SM-BB72
- Recommended BB BSA: SM-BBR60
Crank arm length (choose variant)
- 165mm
- 170mm
- 172.5mm
- 175mm
Material
- Crank arm: Aluminum Anodized
- Crank axle: Steel Plated
- Chainrings: Aluminum Anodized
Color
- Series color
Weight
- approx. 721g/172.5mm (manufacturer information)
