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
SERIES GRX 12-speed
Color Series color
Average weight 710
Rear speeds 12
Compatible chain HG 12-speed
Chain line (mm) 47
P.C.D. (mm) 110/80
Spider/gear arms 4
Chainring combination 48-31T
Q-factor (mm) 151
Crank arm length (mm)|170
Crank arm length (mm)|172.5
Crank arm length (mm)|175
Optional chain guard|Without chain/bash guard
HOLLOWTECH II
HOLLOWTECH crank arm
Compatible bottom bracket type|Outboard
Recommended bottom bracket|Threaded (normal) SM-BBR60
Recommended bottom bracket|Press-Fit SM-BB72
Threaded bottom bracket shell width (mm)|68
Threaded bottom bracket shell width (mm)|70
Crank fixing screw included