What brake dust actually is
Every time you brake, the pads and discs shed fine particles — largely metallic. Heat from braking helps it bond to the wheel surface, which is why plain car wash soap barely touches it, and why wheels on the front axle are usually the worst.
Before you start
- Wheels must be cool. Never spray chemicals on hot wheels straight after a drive — they can dry on and stain.
- Work in the shade where possible.
- Use separate tools for wheels. Never use your wheel brush or bucket on paint.
What you need
- A dedicated wheel cleaner (a pH-balanced one or an iron-fallout remover that changes colour as it works)
- A soft wheel brush for the faces and a long brush for the barrels
- A stiff brush for tyres
- A separate bucket and a hose or pressure washer
Step by step
- Rinse the wheel, tyre and arch to remove loose dirt.
- Spray the wheel cleaner on a cool, wet wheel, including inside the barrel.
- Let it dwell for the time the label says — don’t let it dry.
- Agitate: barrel first with the long brush, then the face and around the wheel nuts.
- Scrub the tyre sidewall — this is where a lot of brown grime lives.
- Rinse thoroughly, including behind the spokes.
- Dry the wheel to avoid water spots.
Don’t: use household acids, oven cleaner or wire brushes on alloys. Be extra careful with chrome, polished, painted-matte or aftermarket finishes — check the product label suits your wheel type.
Keeping them clean
Cleaning wheels every wash stops brake dust from building up and baking on. The longer it sits, the harder it is to remove.
Wheels are always the first part of our exterior wash process — done with dedicated wheel chemicals and tools, before anything touches the paint.