I think a front and rear bumper protection are equally important. However, the rear bumper of a car is usually unprotected and most susceptible to bumper damage. Without a rear bumper protector the plastic bumpers can easily tear when a sharp license plate screw makes contact during parking maneuvers. The front bumper of a car is slightly better protected, especially vehicles equipped with a plastic license plate front bracket. Front car bumper protection like the new BumpShox was designed as a replacement license frame that doubles as a bumper guard.