- 71
- 40T, 42T, 44T, 46T
- 49.7
Specifications
As listed in the manufacturer's catalog.
General
- Series
- GRX
- Model no.
- FC-RX820-1
- Color / 1
- Series color
- Rear speeds
- 12
- Compatible chain
- HG 12-speed
- Chain line (mm)
- 49.7
- P.C.D. (mm)
- 110
- Spider/gear arms
- 4
- Chainring combination
- 40T, 42T, 44T, 46T
- Q-factor (mm)
- 151
- Optional chain guard / Without chain/bash guard
- Yes
- HOLLOWTECH II
- Yes
- Compatible bottom bracket type / Outboard
- Yes
- Crank fixing screw included
- Yes
- Average weight (g) (170 mm, w/o bottom bracket)
-
- Note
Crank arm length (mm)
- 160
- Yes
- 165
- Yes
- 170
- Yes
- 172.5
- Yes
- 175
- Yes
Recommended bottom bracket
- Threaded (normal)
- SM-BBR60
- Press-Fit
- SM-BB72
Threaded bottom bracket shell width (mm)
- 68
- Yes
- 70
- Yes
Crank arm
- Material
- Aluminum
- Finish
- Anodized
Crank axle
- Material
- Steel
- Finish
- Plated
Outer ring
- Material
- Aluminum
- Finish
- Anodized (teeth)/Painted (body)
Outer/middle ring fixing bolt
- Material
- Aluminum
- Finish
- Anodized
How spec sheets write it
The most common ways bicycle spec sheets name it, by number of mentions.
-
GRX RX820-1 1x12 Chainset-170mm-40T
-
Shimano GRX820 40T
-
Shimano FC-RX820-1, GRX, 40T, 12-speed, 170mm
-
Shimano GRX FC-RX820-1 40T ( S&M: 170mm - L&XL: 172,5mm )
-
Shimano GRX FC-RX820-1 Chainset / 172.5mm / 40T
-
Shimano GRX RX-820-1 42t
-
Shimano GRX 820 FC-RX820-1, 40T Crank Length: 170mm-XS(47)-SM(51), 172.5mm-MD(55)-LG(58), 175mm-XL(61)
-
Shimano GRX FC-RX820-1, Hollowtech II, 40T, 4iiii Precision 3+ Powermeter one side
Bicycles
Published bicycles that use it, newest model years first.
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