bumper weight plates
What are bumper plates? Bumper plates are a type of weight plate for Olympic weightlifting, powerlifting, CrossFit-style workouts and more. Unlike the common iron or steel metal weight plates or discs, bumper plates are made of almost 100% rubber or urethane, with a small metal insert in the center. 1  Why use bumper plates?In short, bumper plates are designed so that you can drop a barbell that is loaded with weight plates directly on the ground.