EZBR Rear Bumper Safety Clamp SystemThe EZBR Rear Bumper Safety Clamp System is a tether kit that clamps onto the rear protective bar on your kart and runs a stainless steel cable to the chassis. Newer drivers should know the rear bumper is that back bar that takes hits so your kart and engine stay protected, this simply stops it from completely breaking away after contact. Tracks require these systems because a flying bumper creates real danger for everyone running sprint kart or dirt