4 x 18-21 Inch Waterproof Car Tire Covers Aluminium Film Spare Wheel Covers Dust Protector

Made of waterproof aluminium film, scratch-resistant, wear-resistant, weather-resistant, strong and robust. Protect tires and extend their service life. You can safely park your car outside. Includes 4 tire covers, fit car tire diameters from 18 to 21 inches. Universal fit for car, travel, trailer, RV, SUV, truck, RV and many vehicles. Waterproof, dustproof, windproof, snowproof, rainproof, sun-proof, anti-corrosion. Effectively protect car tires in all weather, universal for all seasons. Elastic strap and hook design ensures a more secure fit and will not be blown away by the wind. Easy to install, remove and clean, no tools required. Folds compactly for easy storage. For example, if your tire is P265/70R16, A=275 B=70 C=16, your tire diameter=A*B/500+C*2.54=265*70/500+16*2.54=78 cm