Shimano GRX RX820 1 x 12 Speed Wide Ratio Groupset

Shimano GRX, designed with gravel-specific ergonomics, optimized gearing, and rugged reliability, offers a quiet, stable drivetrain suited for unpaved adventures.

This premium series provides outstanding performance and value with ergonomic designs and gravel-centric gearing.

These are fully boxed UK products.

Full List of spec- 

Chain: XT/Ultegra M8100 12 Speed Chain

Outer plate design has been developed to reduce the chance of chain suck

Sil-Tec surface treatment technology (PTFE plating) on inner and outer links and rollers that is smooth running and increases durability

For use with 12-speed HG+ drivetrains

Comes complete with Quick Link which enables fast tool free chain assembly

Cassette: XT CS-M8100 12 Speed Cassette (RRP £159.99)

New shift ramp designs provide the fastest, smoothest shifts by HYPERGLIDE+

BEAM SPIDER construction

Lighter and stiffer, reducing cassette inertia for faster acceleration and enhanced chain security

MICRO SPLINE technology

Average weight: 461g (10-45T), 470g (10-51T)

Choose 10-45T OR 10-51T

Chainset: GRX FC-RX820 12-Speed Single (RRP £229.99)

The RX820 series offers premium performance at an incredible value, with thoughtful ergonomic designs and gravel-centric gearing for all manners of unpaved adventure. Choose - 170 , 172.5 AND 175mm with a 40T or 42T chainring 

Rear Mech: GRX RD-RX822 12-Speed Single Rear Derailleur (RRP £119.99)

Low profile Shadow Plus design 12-speed rear derailleur for fast and precise shifting performance

Shadow Plus uses a chain stabilizing switch that, when on, will reduce chain bounce in rough terrain, maintaining more stable drive and shifting

High-tolerance cold forged aluminium link plates and body construction is extremely light and durable

Choose - SGS or GS

R/H Lever: GRX ST-RX820 12-Speed Right Hand STI Lever & BR-RX820 Disc Brake (RRP £349.99)

Greater comfort and control on mixed terrain

Gravel-specific brake lever and bracket ergonomics

Anti-slip coating on brake lever surface

Optimized for use with flared handlebars

L/H Lever: Shimano GRX BL-RX820 Left Hand Lever & BR-RX820 Disc Brake (RRP £329.99)

Brake hose (kit)  - SM-BH90-JK-SSR

Hose joint  - Straight

Clamp band  - Diameter (mm)   - 23.8-24.2

Pads L05A-RF Resin (w/ fin)