PROX Brake Disc for HONDA CRF 250, CRF 450 2015-2026

On HONDA CRF 250, CRF 450 from 2015 to 2026, the PROX 37.BD11315 brake disc fits in place of the original part. Gripped by the pads, the brake disc soaks up the heat of every stop. Its design (cut-outs, petal profile) helps clear mud and cool it down.

Specifications

• Brand: PROX
• Manufacturer part number: 37.BD11315

When to replace it?

• Thickness below the minimum stamped on the disc or given in the manual.
• Warped disc: vibration through the lever or pedal, brake that “pulses”.
• Deep scoring, cracks or blueing after overheating.

Measure the thickness with a micrometer every time you change the pads, and replace the disc as soon as it reaches the minimum thickness, or if it's warped or cracked.

Fitting tips

1. Clean the hub mounting face: a single grain of sand under the disc is enough to throw it out of true.
2. Fit the disc the right way round (markings facing out, direction of rotation if indicated).
3. Tighten the bolts in a criss-cross pattern to the manufacturer's torque, with medium-strength threadlocker.
4. Degrease the disc and ideally fit new pads.
5. Bed in with a dozen progressive stops.

Why PROX?

ProX Racing Parts has been supplying engine and clutch parts to motocross riders since 1975, from its headquarters near Amsterdam. According to its catalogue, most of its parts are made in Japan, by manufacturers that also produce parts for the Japanese motorcycle makers.

Spare parts and items to plan

• Brake pads : NISSIN · AP RACING
• Brake fluid : MOTUL 500 ml · MOTUL 5 L

Frequently asked questions

Should the pads be changed along with the disc?
It's strongly recommended: worn pads have taken on the shape of the old disc and won't brake well on a new one.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
HONDA CRF 250 2026
HONDA CRF 250 2025
HONDA CRF 250 2024
HONDA CRF 250 2023
HONDA CRF 250 2022
HONDA CRF 250 2021
HONDA CRF 250 2020
HONDA CRF 250 2019
HONDA CRF 250 2018
HONDA CRF 250 2017
HONDA CRF 250 2016
HONDA CRF 250 2015
HONDA CRF 450 2026
HONDA CRF 450 2025
HONDA CRF 450 2024
HONDA CRF 450 2023
HONDA CRF 450 2022
HONDA CRF 450 2021
HONDA CRF 450 2020
HONDA CRF 450 2019
HONDA CRF 450 2018
HONDA CRF 450 2017
HONDA CRF 450 2016
HONDA CRF 450 2015