50-70 miles is what most seem to be able to handle without coming apart. They are a temporary spare with the idea that they get you off the highway and to a tire shop. Most are also different size than the regular tires and that can cause wear and damage to the drivetrain because the sizes are different. When driving on a spare tire, it is best to ensure your driving speed does not exceed 50 mph. If you're on the highway, stay in the right lane and keep at least three car lengths between your vehicle and others on the road. In some states, you can use your hazard lights to alert other drivers that your car isn't quite up to speed. 2. Don't Go Far. Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. 1 (855) 347-2779 · hi@yourmechanic.com. Read FAQ. GET A QUOTE. You made it! You got your punctured tire repaired before it became damaged any further. The technician fixed it, filled it, and now you’re on your way. Since spare tires are built smaller and lighter, going 50-70 mph causes the tires to wear out quickly. As mentioned earlier, it is dangerous to drive on a spare tire too long because it can cause damage to other parts of your car, such as brakes, transmission, steering system, suspension, and even car heating. Different factors may affect the air pressure in your spare tires. Knowing them helps you keep the spare tire at the optimal level. Temperature Fluctuations. A change in air temperature alters the PSI of your spare tire. A 10-degree Fahrenheit temperature increase raises the tire’s air pressure by approximately 1 to 2 PSIs. One of the most important facts to remember is that you shouldn’t exceed 50 mph when driving on a smaller spare tire. These donut-type spare tires, also known as space-savers, aren’t designed for prolonged use at high speeds. Driving at high speeds can cause the tire to become unstable, increasing the risk of an accident. This low-tire-pressure warning light is set to illuminate at 25 percent below the manufacturer's recommended pressure. A high-line display in a vehicle shows you each individual tire's pressure Reviewed by Shannon Martin, Licensed Insurance Agent. It’s not recommended that you drive on a spare tire for more than 70 miles. Spare tires aren’t built for distance travel. If you have a full-size spare tire you can travel a bit farther, but manufacturers still recommend not using the full-size spare for extended periods or as a total Step 7: Lift vehicle using jack. Pump the jack slowly until the flat tire is off the ground. Make sure none of your or anyone else’s body parts go under the car while you’re raising it or once it’s raised. If your car moves while it’s on the jack, don’t try to stop it. It was tight but definitely doable. You can mount a 33″ spare up without adjustments and without airing the tire down. Spare Tire Support Brackets. The full-size spare touches all 4 tire support brackets. The spare tire support brackets are designed to hold the spare in place at four corners. 7hbH.