External bicycle chainring Shimano GRX820-2 external 48 teeth

The SHIMANO GRX Y0SC98010 48-tooth chainring is an original part designed specifically for Shimano GRX FC-RX820-2 cranksets. Designed for modern Gravel drivetrains, it guarantees smooth, precise and reliable transmission on all types of terrain, whether road, trail or mixed courses.

Manufactured to Shimano quality standards, this chainring ensures perfect compatibility with the Shimano GRX system, the range specially developed for Gravel riding. Its 48-tooth teeth are ideal for the outer chainring of a double crankset, offering an excellent balance between speed on the road and performance on rolling trails.

Thanks to its high-precision machining, it optimises gear shifting with GRX derailleurs and 12-speed chains Shimano. Its robust aluminium design also guarantees excellent resistance to wear, even during intensive use in demanding conditions (dust, mud, long distances).

This chainring is the ideal solution for replacing a worn chainring or restoring the original performance of your GRX crankset.

Technical specifications

Product : Outer chainring for gravel crankset

Brand: Shimano

Series: Shimano GRX

Manufacturer reference: Y0SC98010

Number of teeth: 48T

Compatibility: Shimano GRX FC-RX820-2

Transmission: 2x12 speeds

Position: Outer chainring

Material: High-strength aluminium

Use: Gravel / road / endurance

Highlights

Original part Shimano (OEM)

Smooth, precise shifting

Designed for GRX 12-speed drivetrains

Excellent durability and resistance to wear

Ideal for replacing or servicing cranksets

Frequently asked questions

Is this chainring compatible with other Shimano cranksets?

This chainring is designed primarily for the Shimano GRX FC-RX820-2 crankset. To ensure optimum performance, we recommend using it only with this model or equivalent GRX 12-speed cranksets.

Can only the 48-tooth chainring be replaced?

Yes. On the GRX double crankset, the outer chainring can be replaced independently when worn, without changing the whole crankset.

Does this chainring work with an 11-speed drivetrain?

No. This model is optimised for GRX 12-speed drivetrains. For an 11-speed drivetrain, it is preferable to use chainrings specific to this generation.

What chain should I use with this chainring?

We recommend using a GRX-compatible Shimano 12-speed chain, such as those used with modern gravel groupsets Shimano.

How do I know if my chainring needs replacing?

Replacement is recommended if you notice:

worn or sharp teeth

chain jumping under load

less precise gear shifting