What Is a Run Flat?Ī run-flat tire is designed to maintain safety and steering in the event of a tire blowout. They can also be expensive and difficult to repair.Ĭontinental ContiSport Contact 5 with ContiSeal is an example of a self-sealing tire. Self-sealing tires have a limited puncture size they’ll be able to handle and won’t work on punctures into the side of the tire. This allows you to keep driving and head to a repair shop without needing to stop. When your tire experiences a puncture from a nail or other sharp object, the sealer inside is designed to surround and fill in the hole to stop a loss in tire pressure. What Is a Self-Sealing Tire?Ī self-sealing tire is coated inside with a sealant. If your car does not come with a donut spare, you’ll need to consult a tire specialist on purchasing one that will work with your vehicle. This more compact tire will still need to be designed for the correct specification and size of your vehicle. This doesn’t mean that you can use just any donut spare, though. However, a donut spare will be much slimmer than your normal tires for easier storage. Is a Spare Tire the Same Size as Regular Tires?Ī full-sized spare should be the exact size as your normal tires and can even be used in your normal tire rotation schedule. Keep in mind that the donut spare needs much higher air pressure than your normal tires – spare tire PSI will be indicated on the sidewall. Yes, you’ll need to make sure your spare tire is at the correct pressure, but also check for punctures or cracks from extended storage. Do You Need to Check Tire Pressure in Your Spare? Even in storage, the tire rubber can decay over time, rendering the tire too brittle to use. A spare tire should be checked when you would check your normal tires for wear, pressure, and other damage. How long an unused spare tire lasts depends on how well you care for it, just like your everyday tires. How Long Does a Spare Tire Last in Your Trunk?Ī donut spare can last around 6-10 years in storage. The industry standard is you drive no more than 50 miles and no faster than 50 miles per hour on a spare tire. We are often asked how long a spare tire will last, how long you can drive on a spare tire and what the speed limit is for a spare tire. Many Jeeps have full-sized spares mounted on the door to the trunk, for example. It’s a temporary, quick fix.įull-size spares are an option, but you’ll need to have the space on your vehicle for a whole extra tire. However, due to its small size, it’s usually only rated for around 50 miles per hour and only 50-60 miles. These are referred to as “donut spares.” It’s compact and stored in your trunk while not weighing your car down. Rather than have your vehicle towed, you can quickly switch out your damaged tire with your spare and get back on the road.Ī spare tire traditionally comes in a compact, lightweight model meant to get you that extra few miles in case one of your tires blows out. What Is a Spare Tire?Ī spare tire is an extra tire that you store in your car in case you experience a blowout or puncture while on the road.
For those of us with spare tires stored in our cars, this article will serve as a refresher for spare tire purpose, use, and maintenance. While this is a small contribution to the ultimate decision of whether or not to buy a car, it’s worth knowing what you’ll be missing out on. You may have noticed that many new cars are coming without the spare tire that’s traditionally housed in the back of the trunk.
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