This has been a problem of mine for a while, and I'm sure everyone else has the same problem. The bottom of my radiators take a beating from rocks and roost. They get smashed up in just a couple rides, and new radiators are expensive. Here is my radiator after just a couple races: So I decided to do something. I had some pieces of carbon fiber laying around left over from making a skid plate. I decided to cut them to shape and stick them to the bottom of the radiators with silicone. This way the carbon fiber and the silicone will absorb the hit of rocks and mot leave the sharp dents and holes in the lower radiators. I'm sure you can use many different materials, but the carbon fiber looks trick too.