To improve your shopping experience today and in the future, this site uses cookies.
I Accept Cookies
The Shimano GRX ST-RX820 12-Speed Hydraulic Disc Brake STI is engineered for precision, control, and rugged reliability when you're riding rough gravel terrain.
The Shimano GRX ST-RX820 12-Speed Hydraulic Disc Brake STI is engineered for precision, control, and rugged reliability when you're riding rough gravel terrain.
Shimano

Shimano GRX ST-RX820 12-Speed STI Bled with BR-RX820 FM Calliper - Right Front

£349.99
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined

Shimano GRX ST-RX820 12-Speed STI Bled with BR-RX820 FM Calliper - Right Front

Brand:Shimano

Code:RX82012RF

Shimano GRX ST-RX820 12-Speed STI Bled with BR-RX820 Flat Mount Calliper - Right Front

The Shimano GRX ST-RX820 12-Speed Hydraulic Disc Brake STI, engineered for precision, control, and rugged reliability when you're riding rough gravel terrain. Designed specifically for gravel riding, this high-performance brake and shift system offers smooth shifting, powerful braking, and enhanced grip, ensuring confidence on rough terrain.

  • Gravel-Specific Ergonomics – Optimised for stability, comfort, and control on unpredictable surfaces
  • Hydraulic Disc Brake Power – Minimal effort, maximum braking performance in all riding conditions
  • Enhanced Grip & Control – Higher brake lever axis and curved design improve handling on rough terrain and descents
  • Anti-Slip Texture & Brake Lever Coating – Reduces hand fatigue while increasing braking efficiency
  • Secure Hood Design – Raised hood head and recessed finger notch prevent hand misalignment and slippage
  • Complete Pre-Bled Kit – Includes right-hand ST-RX820 STI, BR-RX820 flat mount front caliper with pads, hose, and mineral oil (rotor and adapter not included)
  • Shimano GRX – The First Dedicated Gravel Groupset – Trusted by gravel cyclists worldwide for smooth shifting and exceptional performance

Whether tackling gravel trails, mixed terrain, or endurance rides, the Shimano GRX ST-RX820 delivers unmatched braking power, reliability, and shifting precision for an unparalleled riding experience.

Shimano GRX is the World's first dedicated gravel component group. Gravel cycling thrives on inclusivity and exploration. From beginners to seasoned riders, cyclists trust Shimano GRX, the industry's first gravel-specific groupset, for seamless shifting, dependable braking, and unmatched comfort on any terrain.

Technical Information
  • Product Type
    Hydraulic Disc
  • Product Type
    Road & Drop Bar
  • Speed
    12 Speed
  • Discipline
    Gravel & Cyclocross
  • Colour
    Black
  • Size
    12-Speed
  • Di2
    No
  • Shift Mechanism
    Mechanical
Sizing Information

General Unisex Brand Information

Professional Opinion

Also in the range

Home Gravel and Cyclocross Components Shimano Gears & Drivetrain