Storing a vehicle for extended periods can cause permanent tire deformation, resulting in lower ride quality for your vehicle. Flat Spot Preventing Tire Ramps are designed to disperse weight evenly on tires during long-term storage. Made from rust free highly durable and slide-resistant Polypropylene material. Just position the ramps in front of your tires and drive forward. Set includes 4 ramps (one for each tire). Max load 5 tons.