PROX Brake Disc for HONDA CR 125, CR 250, CRF 250, CRF 450 2002-2026

The PROX 37.BD21202 brake disc is designed for HONDA CR 125, CR 250, CRF 250, CRF 450 from 2002 to 2026. The disc, bolted to the hub, is the surface the pads clamp onto. It has to stay flat and thick enough to get rid of the heat: a tired disc lengthens stopping distances and wears the pads.

Specifications

• Brand: PROX
• Manufacturer part number: 37.BD21202

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?

Founded in 1975 and based near Amsterdam, ProX specialises in engine and clutch wear parts for off-road bikes. The brand has most of its range made in Japan, by OEM suppliers, for quality on a par with the original parts.

Spare parts and items to plan

• Brake pads : BREMBO 07KA17LA · BREMBO 07KA17TT
• Brake fluid : MOTUL 5 L · MOTUL 500 ml

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 CR 125 2007
HONDA CR 125 2006
HONDA CR 125 2005
HONDA CR 125 2004
HONDA CR 125 2003
HONDA CR 125 2002
HONDA CR 250 2007
HONDA CR 250 2006
HONDA CR 250 2005
HONDA CR 250 2004
HONDA CR 250 2003
HONDA CR 250 2002
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 250 2014
HONDA CRF 250 2013
HONDA CRF 250 2012
HONDA CRF 250 2011
HONDA CRF 250 2010
HONDA CRF 250 2009
HONDA CRF 250 2008
HONDA CRF 250 2007
HONDA CRF 250 2006
HONDA CRF 250 2005
HONDA CRF 250 2004
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
HONDA CRF 450 2014
HONDA CRF 450 2013
HONDA CRF 450 2012
HONDA CRF 450 2011
HONDA CRF 450 2010
HONDA CRF 450 2009
HONDA CRF 450 2008
HONDA CRF 450 2007
HONDA CRF 450 2006
HONDA CRF 450 2005
HONDA CRF 450 2004