Most Polaris Rangers come with standard tires that are 25 inches in diameter. However, many riders choose to upgrade to larger tires for improved performance and stability. The largest tires that can be safely installed on a Polaris Ranger have a 32-inch diameter. While it is possible to install even larger tires on some models of the Ranger, doing so may cause damage to the vehicle and void the warranty. When choosing new tires for your Ranger, be sure to consult with a qualified mechanic or dealer to ensure they will be compatible with your specific model.