Shimano GRX RX820-1 Crankset (Black) (1 x 12 Speed) (Hollowtech II) (165mm) (42T)

Shimano GRX FC-RX820-1 Crankset Description:

The Shimano GRX FC-RX820-1 Crankset brings 1x to Shimano GRX 12-speed. The 1x crankset is designed for gravel racing and fast gravel riding and, when paired with a 10-45t cassette, provides optimal gearing and gear steps to provide the best performance in gravel racing. It’s constructed with a slight narrowing, compared to past models, to accommodate a narrower 12-speed chain and promises smooth and reliable shifting. With these two applications in mind, the GRX FC-RX820-1 chainring is a high-performing and versatile part of the fast gravel world.

Features:

• Narrower teeth to accommodate a 12-speed chain width
• Pairing with a 10-45t cassette provides optimal gearing and gear steps for gravel racing and fast gravel riding
• Optimized for use with up to 10-46T and 10-51T cassette options
• Hollowtech II spindle interface

Specifications:

• Intended Discipline: Gravel
• Spindle Diameter: 24mm (Shimano)
• Bottom Bracket Included: No
• Pedal Spindle: 9/16″
• Chainrings Included: Yes
• Chainring BCD: 110mm Shimano Asymmetric
• Chainring Mount: 4-Bolt
• Chainline: 49.7mm
• Drive Type: 1x
• Speed Compatibility: 12 Speed
• Chainring Material: Aluminum
• Crankarm Material: Aluminum
• Color: Black
• Weight: 655g (172.5mm | 40T)

This product is expected to become available for purchase on Friday, October 2, 2026