THE ONLY TOW DOLLY THAT WILL PAY FOR ITSELF OVER TIME HOW? Some Rv parks charge extra for trailers depending on size, Traditional tow dollies measure up to 10 ft in length and that's an extra 10 ft of space you will have to pay coming out of your pocket! With this towdolly you will be saving a tremendous amount of space when it comes to storage. As this unit will store vertically " STANDS UP FOR STORAGE. Yes! The only car tow dolly in the market that is capable of doing so! LOAD UP TIME TAKES LESS THAN 15 MINS, Safety chains , Ramps and Straps are equipped with this trailer dolly. 145/12" 10 ply "RV GRADE" Tires Each RATED AT 1530LB WHY A SMALLER WHEEL THAN MOST DOLLIES? We minimized the tire to accommodate low profile sedans and minivans, Although this unit is capable of towing 5000lb. Traditional car tow dollies ramps are integrated and can not be adjusted therefore this leads to the use of small pieces of 2x4 or bumper scratches.