Shimano GRX Kit Overview

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.

Included Parts:

Cassette: Shimano Ultegra CS-R8000 11-Speed Road Bike Cassette

• Lightweight 11-speed HG-EV cassette with rigid alloy sprocket carrier for reduced weight and improved shifting performance
• Suitable for road and gravel bikes
• Hyperglide EV sprockets for precise shifting and reduced wear
• Compatible with Shimano HG-style freehubs
• Wide gear range to suit all riding styles
• Compatible with 11-speed HG-EV or HG-X11 chains

Chainset: Shimano GRX FC-RX810 11-Speed Double Chainset

• Optimum gearing for mixed terrains with gravel gear ratios to maintain rhythm over rough surfaces
• Wider range front system with 17T front range
• Gear combination: 48-31T

Chain: Shimano 105 5800 / SLX M7000 CN-HG601 11-Speed Chain

• 116 links with hardened plates and Shimano-designed quick link
• Narrow, lightweight HG-EV design for durability and smooth shifts
• Sil-Tec surface treatment for reduced friction and increased lifespan
• Weight: 257g

Front Derailleur: Shimano GRX FD-RX810 11-Speed Double Front Mech

• Fast, precise shifting performance with wider tire clearance due to a 2.5mm chainline adjustment
• Braze-on fit; compatible with 11-speed HG chains
• Wide range 17T capacity, 46-50T outer chainring
• Weight: 96g

Rear Derailleur: Shimano GRX FD-RX810 11-Speed Shadow+ Double Rear Mech

• Silent and uninterrupted shifting on rough terrain with adjustable chain stabilizer
• SHIMANO SHADOW RD+ design with gravel-tuned clutch tension
• Toggle clutch ON/OFF and stabilizer switch for terrain adaptability
• Maximum front difference: 17T; top sprocket: 11T; low sprocket: Max 34T, Min 30T
• Total capacity: 40T

Shifter/Brake: Shimano GRX ST-RX810/BR-RX810 11-Speed STI Lever & Disc Brake

• GRX hydraulic disc brakes provide control, modulation, and power with minimal effort
• Raised hood design prevents hand misalignment, while anti-slip texture enhances grip
• Weight: 306g

Genuine new, boxed Shimano product (not OEM parts) – Biketart are proud official Shimano stockists.