A truck’s brake calipers clamp the brake pads against the rotor, turning forward motion into heat and heat into a controlled stop. This guide covers how truck brake calipers work, the different types in use today, including air disc brake (ADB) calipers, now standard on most heavy-duty trucks, plus warning signs, costs, and maintenance basics. Frequently Asked QuestionsWhat is an air disc brake caliper? Are air disc brakes better than drum brakes? Do air disc brake calipers need manual adjustment?