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Last updated 4/24/2025 - Originally published 12/02/2022
Written by SimpleTire, Expertly reviewed by Brett Antosh
A flat tire can be an unexpected and frustrating roadside emergency. While temporary spare tires, also known as "donuts," provide a short-term solution, it's crucial to understand their limitations and use them safely.
Temporary spare tires are designed to get you to the nearest service station or tire shop for a proper repair or replacement. However, driving on a spare tire for too long or at high speeds can put you, your passengers, and your vehicle at risk.
In this article, we'll explore the ins and outs of temporary spare tires, including how long and far you can safely drive on one, as well as important safety tips to keep in mind when using a spare.
What is a Temporary Spare Tire?
Temporary spare tires, often referred to as "donut" spares, are smaller and lighter than regular tires. They are designed specifically for short-term use in emergency situations when a vehicle's primary tire is damaged or flat.
These compact spares are included with many new vehicles to save space and weight in the trunk or cargo area. However, it's important to note that temporary spares are not built to the same standards as regular tires—they have limitations on speed and distance that must be observed for safe use.
Temporary spare tires typically have a smaller diameter and narrower tread compared to standard tires. This reduced size allows them to fit into the limited storage space available in most vehicles. Additionally, the lightweight construction of temporary spares helps to minimize the added weight of carrying a spare tire.
While temporary spares are a convenient solution for getting back on the road quickly after a flat, they are not intended to be a permanent replacement for a regular tire. Understanding the differences between temporary spares and standard tires is essential for ensuring your safety and preventing damage to your vehicle when using a donut spare.
How Long and Far Can You Drive on a Temporary Spare?
Temporary spare tires serve as a short-term fix, enabling you to reach the nearest location where your regular tire can be addressed. Ideally, travel on a temporary tire should remain within a 50-mile radius. This range helps preserve the tire’s integrity and ensures your vehicle operates safely during this interim period.
In cases where extending beyond 50 miles is unavoidable, limiting your distance to 70 miles is possible but not advised. Pushing these boundaries heightens the risk of tire malfunction and jeopardizes safety. Limiting your travel distance with a spare tire is essential to avoid premature wear or failure.
Speed limitations are another critical factor, as temporary spares are intended for use at speeds under 50 mph. Opting for local routes over highways is preferable, as it supports adherence to this speed restriction with greater ease. Higher speeds can strain the tire and potentially lead to a loss of control—conditions these tires are not equipped to handle.
The primary purpose of a temporary spare is to act as a temporary measure, allowing you to transition from a flat tire to professional service. By adhering to these guidelines, you can significantly reduce the risks involved, ensuring a safer journey to your destination.
Safety Tips for Driving on a Temporary Spare Tire
Before setting off with a temporary spare, verify the tire's air pressure to ensure optimal performance. Spare tires often lose pressure when stored for long periods, impacting their effectiveness. Utilizing a tire gauge provides an accurate reading, allowing you to make necessary adjustments and maintain safe driving conditions.
When driving on a temporary spare, adopt a cautious approach, as these tires offer less grip and stability. Minimize abrupt maneuvers such as sharp turns or quick stops, as this can stress the spare tire more than intended. A steady driving style not only conserves the tire's integrity but also enhances overall vehicle control.
It's prudent to avoid driving in extreme weather conditions with a spare tire. Without the intricate tread designs of regular tires, spares can struggle with traction on wet or icy roads. Consider delaying travel plans during adverse weather, or proceed with extreme care if immediate travel is necessary.
If you find yourself relying on a spare tire for an extended timeframe, routine inspections are essential. Keep an eye out for any visible damage or wear, like uneven tread or sidewall bulges, which could signal a need for replacement. Regular check-ups of the spare can help maintain its reliability until you can replace the original tire.
Driving on a temporary spare tire longer than advised presents notable challenges. These tires lack the durability required for extended use, making them susceptible to increased wear and potential failure. Pushing them beyond their intended limits risks a sudden blowout, which compromises your ability to maintain control of your vehicle.
Extended reliance on a spare tire significantly depletes its lifespan, leaving you without a backup when another flat tire occurs. This lack of preparedness can be inconvenient and unsafe, particularly if you find yourself in remote areas or during adverse conditions. Ensuring your spare remains in good condition is crucial for ongoing vehicle safety.
Additionally, the imbalance caused by a spare tire can lead to undue stress on your vehicle's components. Over time, this can manifest as issues with your suspension or alignment, potentially resulting in expensive repairs. Prioritizing timely tire repair or replacement mitigates these risks and supports the overall health of your vehicle.
Replacing Your Temporary Spare Tire
Swiftly addressing the repair or replacement of your regular tire after using a temporary spare is crucial. This action restores your vehicle's performance and ensures continued safety. Postponing these repairs can lead to extended reliance on the spare, risking its overuse. Engaging with a tire professional promptly helps you regain optimal driving conditions.
Should the spare be utilized beyond its intended limits, consider obtaining a replacement. Extended use can compromise the spare's durability, reducing its reliability in future emergencies. Regular inspections of your spare tire's condition are key to maintaining its readiness. Keeping a dependable spare available provides reassurance during unexpected situations.
For frequent travelers or those who venture into remote areas, upgrading to a full-size spare may offer significant benefits. Full-size spares match your vehicle's regular tires more closely, enhancing handling and stability. This upgrade proves invaluable when tire service access is limited, ensuring a reliable backup is always at hand. Adhering to the manufacturer's maintenance and replacement guidelines supports both vehicle safety and tire longevity.
While temporary spare tires offer a lifeline during unexpected flats, understanding their limitations is essential for your safety. By adhering to recommended speed and distance guidelines, you can confidently navigate to a service location for a proper repair or replacement. When you're ready to shop for new tires online, we're here to help you find the best deals and get back on the road with peace of mind.