The Barrel Boss Flex - wheel brush

The Boss that flexes.

The Barrel Boss Flex is built to reach the areas standard barrel brushes can’t. Its flexible design allows you to navigate around spokes, behind calipers, and into contoured wheel barrels with ease.

The soft microfiber head safely lifts brake dust and grime while adapting to the shape of the wheel, giving you better contact in hard-to-reach areas without risking damage.

If you’re dealing with complex wheel designs or tight angles, this is the brush that gets around it.

Struggling to reach behind spokes or around calipers?
Straight brushes can only go so far. The Flex is designed to bend and adapt so you can clean areas that usually get missed.

👉 Check out our wheel cleaning guide here.

How to Use

1. Rinse the wheel thoroughly to remove loose dirt and debris.

2. Apply wheel cleaner directly to the wheel or brush.

3. Insert the brush into the barrel and use controlled movements to navigate around spokes and tight areas.

4. Flex the brush as needed to reach behind calipers and contoured sections.

5. Rinse thoroughly and repeat if necessary.

Detailer Tips

Use the flexibility: Let the brush bend naturally to follow the shape of the wheel.

Perfect for complex designs: Ideal for wheels with tight spacing, angles, and obstacles.

Reach behind components: Great for cleaning behind calipers and deep inside barrels.

Don’t force it: The flexibility does the work—no need to jam it into tight spots.

Keep it wheel-dedicated: Never cross over to paint or interior surfaces.

Brush Care

Rinse thoroughly with water after each use.

Gently squeeze out excess water from the microfiber head.

Hang upside down or place in a dry area to fully dry.