By checking "Unusual Dimensions", you are telling shippers that your vehicle has some sort of unusual dimension such as extreme width, length, or height, that may affect how the vehicle is shipped. For example, large SUVs, like Ford Excursion's are difficult to shipped on an enclosed trailer because they are very tall and long. It might be a race car with a large rear wing or a low-rider with very little ground clearance. It is extremely important that you fill in some brief, but specific notes (i.e. width of the vehicle) in the Unusual Dimensions note box. This will help shippers provide you with the most accurate quotes.