The Boss of the Barrel. The Barrel Boss Pro is your go-to brush for cleaning inside wheel barrels, spokes, and deep wheel areas. Built with a soft microfiber head, it safely lifts brake dust and grime while gliding across the surface without scratching. The comfortable handle gives you solid control during cleaning, while the built-in rubber guard helps protect your wheels from accidental contact. It’s designed to give you confidence when working in deeper, harder-to-reach areas. If you’re looking for a safe, effective way to clean the inside of your wheels, this is the one you grab. Struggling to safely clean inside your wheels? The barrel is where the worst buildup lives; this brush is built to clean effectively while keeping surfaces protected. 👉 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 agitate using in-and-out motions. 4. Work around spokes and deeper sections as needed. 5. Rinse thoroughly and repeat if necessary. Detailer Tips Start with the barrel: Clean inner areas first to avoid re-contaminating the face. Let it glide: The microfiber is designed to clean safely—no need to force pressure. Protection built in: The rubber guard helps prevent accidental contact with the wheel. Comfort matters: The handle design helps reduce fatigue during full wheel cleaning. 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.