The Chemical Guys Stiffy Brush is a stiff-bristled scrubbing brush built for tyres that have picked up dirt, grime and tar, with bright blue synthetic bristles that make it easy to keep separate from brushes used on paintwork. Chemical Guys pairs it with an ergonomic, rugged plastic handle and an abrasion-resistant body for repeated use, and recommends following up with a Chemical Guys dressing or protectant once the tyre is clean and dry. Beyond tyres, the same medium to heavy-duty bristles work well on carpets, upholstery and plastic trim, both in the car and around the home or office. It is a straightforward addition to a wheel and tyre kit, well suited to sitting alongside a dedicated wheel cleaner and paired with separate brushes for paintwork to avoid cross-contamination.