Optimal gearing for spirited group rides and aggressive racing
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 2x12-speed crank utilizes a 48-31T chainring and comes in 170, 172.5, and 175 mm crank arm lengths.
FEATURES
- Smaller gear steps for cadence control on mixed-terrain riding
- Gravel-optimized gear ratios preserve riding rhythm on rough surfaces
- Wider gear range
- 17T range covers array of riding conditions
- Gear combination: 48-31T
PRODUCT SPECIFICATIONS
| MODEL NO | FC-RX820-2 |
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| SERIES | GRX 12-speed |
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| Color | Series color |
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| Average weight | 710 |
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| Rear speeds | 12 |
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| Compatible chain | HG 12-speed |
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| Chain line (mm) | 47 |
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| P.C.D. (mm) | 110/80 |
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| Spider/gear arms | 4 |
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| Chainring combination | 48-31T |
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| Q-factor (mm) | 151 |
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| Crank arm length (mm)|170 | ✔ |
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| Crank arm length (mm)|172.5 | ✔ |
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| Crank arm length (mm)|175 | ✔ |
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| Optional chain guard|Without chain/bash guard | ✔ |
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| HOLLOWTECH II | ✔ |
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| HOLLOWTECH crank arm | ✔ |
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| Compatible bottom bracket type|Outboard | ✔ |
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| Recommended bottom bracket|Threaded (normal) | SM-BBR60 |
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| Recommended bottom bracket|Press-Fit | SM-BB72 |
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| Threaded bottom bracket shell width (mm)|68 | ✔ |
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| Threaded bottom bracket shell width (mm)|70 | ✔ |
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| Crank fixing screw included | ✔ |
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