ROSE Bikes GRX FC-RX820-1 Chainring, Single| Chainrings

Original SHIMANO chainrings for the SHIMANO GRX FC-RX820 Hollowtech II crankset for single x 12-speed drivetrains.

Details:
Intended use: Gravel, Road, Cyclocross

for SHIMANO Crankset:
GRX FC-RX820

SHIMANO part: Y-0SB98010
Gear ratio: 40 teeth
Material: aluminium
Compatibility: 12-speed / single
Attachment: 4-bolt spider
Bolt circle: 110/80 mm (asymmetric)

SHIMANO part: Y-0SB98020
Gear ratio: 42 teeth
Material: aluminium
Compatibility: 12-speed / single
Attachment: 4-bolt spider
Bolt circle: 110/80 mm (asymmetric)

In the box:
1 SHIMANO GRX FC-RX820-1 chainring