Use what we use and enjoy Free Shipping too! Race Ramps are used exclusively here at CLR to load and unload race cars. These low profile ramps make it easy to keep things from dragging as you load vehicles with low clearance. They are light weight which cuts down on hauling weight and store easily.   Each trailer application is a little different , make sure of your application prior to ordering. Unsure of your measurements, visit the Race Ramp calculator here