- 325
- 12
- 42T
- 36T
- HG 12-speed
Specifications
As listed in the manufacturer's catalog.
General
- Series
- GRX
- Model no.
- RD-RX820
- Color / 1
- Series color
- Rear speeds
- 12
- Compatible chain
- HG 12-speed
- RD construction / SHIMANO SHADOW RD+
- Yes
- Cable adjuster
- Yes
- Max. front difference
- 17T
- Total capacity
- 42T
- Fluoric coated link bushings
- 4
- P-axle / Material
- Steel
- Plate body / Material
- GFRP
- Inner link / Material
- GFRP
- Average weight (g)
- 270
Applicable derailleur hanger
- SHIMANO ROAD type / Direct attachment (conventional)
- Yes
- SHIMANO ROAD type / Direct mount
- Yes
- UDH standard
- Yes
Low sprocket
- Max.
- 36T
- Min.
- 34T
Top sprocket
- Max.
- 11T
- Min.
- 11T
Pulley
- Guide pulley bearing
- Yes
- Tension pulley bearing
- Yes
- Teeth
- 11/13T
- Screws material
- Stainless steel
- Sunken type pulley screw
- Yes
Bracket
- Material
- Aluminum
- Finish
- Painted
B-axle
- Hollow axle
- Yes
- Material
- Stainless steel
- Finish
- Passivation
B-axle 2
- Material
- Aluminum
- Finish
- Anodized
Bracket body
- Material
- Aluminum
- Finish
- Painted
Outer link
- Material
- Aluminum
- Finish
- Painted
Outer plate
- Material
- Aluminum
- Finish
- Painted
Inner plate
- Material
- Aluminum
- Finish
- Painted
Cable fixing screw
- Material
- Stainless steel
- Finish
- Passivation
Stroke adjusting screw
- Material
- Steel
- Finish
- Plated
How spec sheets write it
The most common ways bicycle spec sheets name it, by number of mentions.
-
Shimano GRX RX820
-
Shimano GRX RX820 12 Spd
-
Shimano GRX RX-820
-
Shimano GRX 820 12sp
-
Shimano GRX RX820 12V
-
Shimano GRX 820 Shadow+, RD-RX820-D, 12-speed, Direct Mount, Total capacity: 42 T
-
Shimano GRX, RD-RX820, 24-S
-
Shimano GRX RD-RX820, 12-Speed
Bicycles
Published bicycles that use it, newest model years first.
