Shimano GRX BRAKE CALIPER (BR-RX400-R)

Brake Caliper

GRX BRAKE CALIPER (BR-RX400-R)

Specifications

Manufacturer
Shimano
Name
GRX BRAKE CALIPER (BR-RX400-R)
Series
RX400
MPN
BR-RX400-R
Groupset
GRX
Position
Rear
Brake Type
Hydraulic Disc[1]
Disc Mount Type
Flat Mount
Fluid Type
Mineral
Sources
  1. [1] AI-extracted, not yet checked against a named source (added 9 Feb 2026): Brake Type

Compatibility

Shimano GRX BRAKE CALIPER (BR-RX400-R) is a Shimano brake caliper. Everything listed below was matched on a specification we hold for both parts: the interface each pairing actually depends on, such as freehub body, speed count, actuation or mounting standard. Where we could not verify that interface, the part is left out rather than assumed to fit.

Frames with a matching brake mount20

0 SLMechanically compatible

Wilier

0 SL

  • Both use a flat mount disc brake
0 SLRMechanically compatible

Wilier

0 SLR

  • Both use a flat mount disc brake
29er Hardtail Frame LCM914 Full Hidden Internal Cable RoutingMechanically compatible

LightCarbon

29er Hardtail Frame LCM914 Full Hidden Internal Cable Routing

  • Both use a flat mount disc brake
4S DiscMechanically compatible

Kinesis

4S Disc

  • Both use a flat mount disc brake
700c Aero Disc Brake Road FramesetMechanically compatible

LightCarbon

700c Aero Disc Brake Road Frameset

  • Both use a flat mount disc brake
765 OptimumMechanically compatible

Look

765 Optimum

  • Both use a flat mount disc brake
785 HuezMechanically compatible

Look

785 Huez

  • Both use a flat mount disc brake
785 Huez RSMechanically compatible

Look

785 Huez RS

  • Both use a flat mount disc brake
795 Blade RS (2023)Mechanically compatible

Look

795 Blade RS (2023)

  • Both use a flat mount disc brake
795 Blade RS 3Mechanically compatible

Look

795 Blade RS 3

  • Both use a flat mount disc brake
796 Monoblade RSMechanically compatible

Look

796 Monoblade RS

  • Both use a flat mount disc brake
A21 “The Dissident” Titanium Gravel Bike FramesetMechanically compatible

Serk

A21 “The Dissident” Titanium Gravel Bike Frameset

  • Both use a flat mount disc brake
A30 “The Captain” Titanium All Road Bike FramesetMechanically compatible

Serk

A30 “The Captain” Titanium All Road Bike Frameset

  • Both use a flat mount disc brake
A30M “The Captain Integrated” Titanium All-Road Bike FramesetMechanically compatible

Serk

A30M “The Captain Integrated” Titanium All-Road Bike Frameset

  • Both use a flat mount disc brake
A40 “The Fixer” Titanium All-Road Bike FramesetMechanically compatible

Serk

A40 “The Fixer” Titanium All-Road Bike Frameset

  • Both use a flat mount disc brake
A9 Road FrameMechanically compatible

ICAN

A9 Road Frame

  • Both use a flat mount disc brake
Addict Gravel RC HMX Frame setMechanically compatible

Scott

Addict Gravel RC HMX Frame set

  • Both use a flat mount disc brake
Addict Gravel Team HMF Frame setMechanically compatible

Scott

Addict Gravel Team HMF Frame set

  • Both use a flat mount disc brake
Addict Gravel Tuned HMX Frame setMechanically compatible

Scott

Addict Gravel Tuned HMX Frame set

  • Both use a flat mount disc brake
Addict RC Pro HMX Frame setMechanically compatible

Scott

Addict RC Pro HMX Frame set

  • Both use a flat mount disc brake

Frequently Asked Questions

What fits Shimano GRX BRAKE CALIPER (BR-RX400-R)?

On this page we list frames with a matching brake mount. Each listing was matched on a specification we hold for both parts; anything we could not verify is omitted rather than assumed to fit.

Is Shimano GRX BRAKE CALIPER (BR-RX400-R) compatible with rim brakes?

No. Shimano GRX BRAKE CALIPER (BR-RX400-R) is built for hydraulic disc systems. The mounting standards and wheel/frame interfaces for disc brakes are different and cannot be mixed.