Update your semi with an additional layer of safety when parking or braking, with the Bendix Type 20/24 Spring Brake Disc that ensures you're Ready for the Road Ahead™. Due to its specialized design, this replacement brake disc is able to work alongside the brake chamber to engage the brakes once air pressure is lost. Constructed with premium-quality materials to withstand harsh operating conditions. FleetPride is your First Click in Heavy Duty®.