The Motor City Bulldog™ Wheel Brush is designed to clean both wheels and tires with its alternating diameter feather-tipped nylon brush. The feather-tipped nylon brush is packed full of nylon monofilament brush material, offering the highest-density brush in the industry. The Bulldog™ Wheel Brush offers superior cleaning and a longer brush life. The extra low lead-in guide rail reaches under the front bumper to the tire, to reduce vehicle contact with the brush.