Find the best semi-truck dash knobs at 4 State Trucks! Make life easier on the road with intuitive controls for everything from air brakes to cab climate. Adjust headlights, engage the engine brake, and manage your truck effortlessly using the right knob. Choose from our selection of wood, chrome, and aluminum dash knobs, available in various scripts like wiper, washer, and dimmer. Each knob is uniquely designed for a specific function, ensuring stress-free driving. Drive smarter and safer with these essential upgrades.