Extend the life of your trailer’s spare tire by protecting it from the sun, dirt, grime, and road salt with this weather-resistant vinyl cover. Elastic-trimmed rear opening gives a snug fit and the vented bottom lets moisture escape. The rubber of most tires contains protective waxes that are released to the surface When you drive on it. Because you’re not using your spare, it’s more vulnerable to damage caused by exposure to UV rays and Ozone. In short, your spare tire will wear out even if its rubber has never met the pavement. A spare tire cover is one way you can combat this form of wear.