You should check your tire pressure every month, including your spare tire. Even if your tires are in good condition, they can lose at least some pressure every month. If you have valve leaks or punctures, they will leak even more.
For the most accurate reading, check your tires when your vehicle has been sitting for about three hours. And always check your tires and spare before taking any long trips.
Purchase a high-quality tire pressure gauge and avoid using the pressure gauges that are offered in gas stations since they’re not always reliable. The tire technicians at Ramona Tire can check the accuracy of your tire gauge for you.