Shimano GRX ST-RX825 Disc Brake Set - Rear

Shimano GRX ST-RX825 rear brake set, ST-RX825 lever with BR-RX820 caliper
Shimano GRX ST-RX825 right Dual Control lever, side profile
Shimano GRX BR-RX820 rear flat mount hydraulic disc brake caliper
Shimano GRX ST-RX825 rear brake set, ST-RX825 lever with BR-RX820 caliper
Shimano GRX ST-RX825 right Dual Control lever, side profile
Shimano GRX BR-RX820 rear flat mount hydraulic disc brake caliper

Shimano GRX ST-RX825 Disc Brake Set - Rear

Shimano GRX ST-RX825 Disc Brake Set - Rear

Shimano logo

Factory pre-bled rear braking from the Shimano GRX ST-RX825

The Shimano GRX ST-RX825 Disc Brake Set Rear is built for gravel and adventure bikes that need complete, factory-ready rear braking, pairing the GRX Dual Control lever with the BR-RX820 flat mount caliper as a pre-bled J-Kit. The RX825 lever delivers GRX ergonomics built for gravel: a textured hood and lever blade for secure control on rough terrain, with the reach and power dialed in for confident braking deep into a ride.

This is the rear assembly, featuring a right lever, the BR-RX820 caliper with a 25mm flat mount and no adapter, resin pads with cooling fin, and a longer 1700mm SM-BH90 hose with connector insert already installed to reach the rear caliper. The pre-bled J-Kit design means clean, consistent braking with minimal setup time, ideal for shops and builders who want reliable GRX stopping power without bleeding the system from scratch.

Out of Stock
$523.99
$523.99 $595.00
Shipping calculated at checkout.

Out of Stock

  • Orders over $100 ship free!
  • Estimated delivery: Jun 20 - Jun 24

Complete the Set

Shimano GRX ST-RX825 front brake set, ST-RX825 lever with BR-RX820 caliper
Shimano GRX ST-RX825 Disc Brake Set - Front $523.99$595.00
View matching side details

Add the matching side to run a complete set.

×

Ask a question

The fields marked * are required.

more details:

Shimano logo

Specifications

  • Series: Shimano GRX
  • Generation: RX825
  • Position: Rear (right lever)
  • Lever: ST-RX825 (R)
  • Caliper: BR-RX820 (R)
  • Caliper Mount: 25mm flat mount, no adapter
  • Pad Type: Resin with fin
  • Hose: SM-BH90, 1700mm, connector insert installed
  • Pre-Bled Kit: Yes (J-Kit Direct)
  • Caliper Material: Aluminum
  • MPN: IRX8251DRRDSC170A

FAQ

Is this the front or rear assembly?

This is the rear set: right lever with the rear caliper on a 25mm flat mount, and a longer 1700mm hose to reach the rear of the bike. The front set is sold separately.

Does it come pre-bled?

Yes. The J-Kit Direct design ships pre-bled with the hose and connector insert installed, so it is ready to mount with minimal setup.

Why is the hose longer than the front?

The rear caliper sits farther from the lever, so it uses a 1700mm hose versus the 1000mm hose on the front set.

Best For

Gravel and adventure riders building or upgrading to a complete GRX RX825 hydraulic rear brake, and shops that want a pre-bled, ready-to-install rear assembly.

Shimano GRX ST-RX825 Disc Brake Set - Rear Reviews:

You may also like