Thats what I always thought too!Actually they're more apt to save your frame. There is a very popular notion that sliders are there solely to protect your plastics in the event of a drop, or a slow speed low side. While they can, and might, help in this event, that is not their intended purpose. They are ment to keep the bike slidding on the side it fell on in the event of a low side spill. Obviously, they are only effective if the bike remains on the pavement. Should the bike leave the pavement and slide into gravel or grass it may dig in, start to tumble, then all hope is lost. But they may make the difference between a few hundred dollars and a write off.