Shimano FC-RX820-2 GRX 12-Speed Double 48T-ND For 48-31T Outer Chainring

The Shimano FC-RX820-2 GRX 12-Speed Double 48T-ND Outer Chainring is a precise and durable solution for riders who need dependable front shifting and efficient power transfer. It combines a light yet rigid build with a 48-31T pairing designed for smooth pedalling in tough gravel conditions, while the HG+-specific profile supports stable and accurate shifts under load.

Key Features and Benefits:

• The 48-31T chainring combination: This pairing provides a wide and practical gearing range that helps maintain steady cadence across steep climbs and fast sections. The outcome is more controlled gear changes and consistent effort on mixed gravel terrain.
• Lightweight aluminium construction: The use of low-mass alloy reduces overall crank weight while still providing high structural strength. This leads to a chainring that supports efficient power transfer without adding bulk, improving ride efficiency.
• Anodised teeth finish: The treated tooth surfaces increase wear resistance by reducing material degradation from grit and chain contact. The outcome is longer-lasting performance and reduced maintenance over time.
• HG+ 12-speed chain compatibility: The tooth shaping works with the HG+ chain to enhance chain engagement and release. This improves shift smoothness and reduces hesitation, supporting reliable front shifting under high load.
• Four-arm, 110 mm BCD design: The bolt pattern delivers even load distribution across the crank interface. This increases stiffness at the chainring and results in crisper, more consistent shift response.
• Genuine Shimano replacement fitment: The precise match to FC-RX820 cranksets ensures correct alignment, tooth profile accuracy, and system-level performance. The outcome is a secure, intended fit that restores original shifting quality.

This chainring suits riders who want reliable and consistent front shifting, even when conditions are rough or the load is high. Its combination of rigid construction, HG+ profiling, and a broad gear range supports stable drivetrain performance without adding complexity. The wear-resistant finish and precise fitment strengthen long-term function while keeping shifts predictable.

This outer chainring provides a straightforward way to restore accurate shifting and drivetrain efficiency. Its proven design and durable build make it a strong choice for keeping your gravel setup working at its best.

Specification:

• Compatible chain Shimano HG+ 12-speed
• Speed: 12 Speed
• Discipline: Gravel & Cyclocross
• Colour: Black
• Size: 48 teeth
• Bolt Circle Diameter: 110mm
• Chainring Fitting: 4 Arms