The SHIMANO FC-RX820-1 crank balances weight savings, optimized efficiency and an array of gearing options that cater to the segmented demands of mixed-terrain riding.
By pairing a 10-45T or 10-51T cassette with 40T and 42T chainrings, riders can choose closer gear steps or ultimate range. The FC-RX820-1 comes in 170, 172.5, and 175 mm crank arm lengths, providing an additional level of customization.
BENEFIT
Optimal gearing for mixed-terrain riding
FEATURE
10-45T and 10-51T cassette options serve array of riding styles
BENEFIT
42T and 40T chainrings available
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Model No
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FC-RX820-1
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Series
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GRX
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Rear Speeds
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12
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Compatible Chain
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HG 12-speed
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Chain Line (mm)
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49.7
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P.C.D. (mm)
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110
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Spider/Gear Arms
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4
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Chainring Combination
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40T, 42T
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Q-Factor (mm)
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151
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Crank Arm Lengths (mm)
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170 ✔ / 172.5 ✔ / 175 ✔
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Optional Chain Guard
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Without chain/bash guard ✔
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HOLLOWTECH II
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✔
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HOLLOWTECH Crank Arm
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✔
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Compatible Bottom Bracket Type
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Outboard ✔
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Recommended Bottom Bracket
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Threaded (SM-BBR60), Press-Fit (SM-BB72)
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Threaded BB Shell Width (mm)
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68 ✔ / 70 ✔
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Crank Fixing Screw Included
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✔
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Average Weight
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644 g (40T), 656 g (42T)
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