Tire Cover Waterproof Universal Spare Wheel Oxford Dust-Proof Protectors Fit for Trailer Truck Campers Motorhome 14-17 Inch 1. Our Spare Tire Cover Are Made Of High Quality Polyester Fiber. With Non-scratch Soft Backing. 2. Powerful Waterproof Fabric, Dustproof And Waterproof, Sunscreen And Anti-corrosion，Maintains The Shape In Any Temperature. 3. Our Car Tire Cover With Nylon Cord And Buckle To Adjustable Fit And Prevent The Tire Cover Blown Away By The Wind,ensures More Secure Fit. 4. Easy To Install And Remove Without Tools and Easy Clean And Quick Dry. 5. Universal for Jeep, Trailer, RV, SUV, Truck and many vehicles. 6. Effectively avoid wear, pollution, degumming and other phenomena of spare tire due to long-term non-use. 7. How to choose size? If your tire is written with P225/65R17. Tire Cover Diameter=22.5*0.65*2+17*2.54=72.43 cm. You need to buy the 15 inch one. Wash instructions: wipe with a cloth to clean.