Is It Ok To Have A Smaller Spare Tire? (Unveiling Truth & Safe Solutions) - CarTIRED (2024)

You’re just about through with a long road trip, one that’s seen miles of open road, tranquil countryside, and bustling cityscapes. You’re almost ready to kick back and savor the sweet taste of accomplishment. But wait, there’s a hiccup. A pothole sneaks up on you, and bam, you’ve got a flat tire. And it’s here, in the middle of nowhere, that you come face to face with your spare tire – a noticeably smaller one. I’ve been there, and like you, I’ve questioned if this pint-sized rubber doughnut is up to the task. After all, it’s not every day you see a car riding on mismatched tires.

Now, I bet you’re wondering, is it okay to have a smaller spare tire? Well, you’re not alone. This is a question that has crossed my mind numerous times throughout my years of driving. Not to worry, I’ve done the research and I have some reassuring answers for you. So buckle up, as we dive headfirst into the world of tires, and figure out together just how fine it is to have that smaller spare.

Remember, it’s these unexpected moments that make our journey memorable. They might be nerve-wracking at the time, but they certainly give us tales to tell. And just like you, I’ve been caught off guard, but together, we’ll face this flat tire conundrum and come out the other side more knowledgeable and prepared for the road ahead.

Can Your Spare Tire Be Smaller?

The short answer is yes, your spare tire can be smaller. In fact, many cars come with a smaller, temporary spare tire often referred to as a “donut” or a “mini spare.” These compact spare tires are designed to save space and weight in your vehicle’s trunk. After all, a full-size spare requires more storage space and adds extra weight to your car. But remember, these smaller spare tires are built for emergency use and are not meant to replace your regular tires permanently.

How Much Smaller Can a Spare Tire Be?

Typically, a smaller spare tire is about 60% to 70% the size of a regular tire. But here’s a critical point to note, the replacement tire diameter should not be more or less than 3 percent of the original tire’s diameter. This is because the spare has to cover the same distance at a greater speed, requiring more power from the differential. So, while it can be smaller, it’s not advisable to go too small.

Why are Spare Tires Smaller Than Normal Tires?

One reason why spare tires are smaller is to save space. If you’ve ever tried to haul around a full-size spare tire, you know it can take up a lot of real estate in your car. Another reason is to help with your fuel economy. Since smaller spare tires are lighter, they contribute to better fuel economy due to their lower weight.

Impact of Driving on a Smaller Spare Tire

What Happens When You Drive On A Smaller Spare Tire?

Now, onto the big question – what happens when you drive on a smaller spare tire? Well, if your spare tire is significantly smaller than your regular tires, this can have some serious implications for your car’s performance. For instance, smaller spare tires have reduced traction due to smaller contact patches, which affects vehicle alignment. This means your car might not handle as well when turning or braking.

Is It Bad To Drive With A Smaller Spare Tire?

Driving with a smaller spare isn’t necessarily bad, but it’s not ideal either. These tires are designed for temporary use and are not built like regular tires. As such, they are less durable and can’t withstand long distances or high speeds. Plus, they can negatively impact your car’s traction, steering, braking, and overall performance.

Does It Matter If Spare Tire Is Smaller?

Yes, it does matter if your spare tire is smaller. Not only can it affect your car’s performance, but it can also pose safety risks if used for an extended period or at high speeds, as they can damage other tires and the car itself.

Duration and Limitations of Using a Smaller Spare Tire

How Long Can You Drive On A Smaller Spare Tire?

The golden rule is not to drive on a smaller spare tire for more than 50 miles or faster than 50 mph. Driving further or faster can increase the risk of accidents or damage.

Speed/Distance Restrictions When Using a Smaller Spare Tire

Most owner’s manuals recommend driving no more than 50 miles with a spare tire. The maximum speed of a spare tire is also limited to 50 mph. This is to avoid vehicle issues like wear and blowouts.

The Legality and Safety Aspects of Smaller Spare Tires

Is There a Permitted Difference in Spare Tire Size?

There is no specific regulation on the permitted difference in spare tire size. However, the general consensus is that the replacement tire diameter should not be more or less than 3 percent of the original tire’s diameter.

Is Having a Smaller Spare Tire Legal?

Yes, having a smaller spare tire is legal. But remember, it’s intended for temporary use only – not for regular driving.

Does Your Spare Tire Need to Be the Same Size?

While it’s ideal for your spare tire to be the same size as your regular tires, it’s not strictly necessary. However, if you plan to drive on your spare for an extended period, it’s best to have a spare that is the same size.

Frequently Asked Questions

Why Are Spare Tires Temporary?

Spare tires are temporary because they’re not designed to handle regular wear and tear. They are meant to help you safely get to a service center when you have a flat or damaged tire.

Can Your Spare Tire Be Bigger?

While it’s possible for your spare tire to be bigger, it’s not recommended. A bigger spare tire can affect your car’s handling and fuel economy.

Can I use a 16 inch spare with 17 inch wheels?

Technically, yes, you can use a 16-inch spare with 17-inch wheels. However, it’s important to ensure that the overall diameter of the spare is not more or less than 3 percent of the original tire’s diameter. Remember, the aim is to get you to the nearest service center safely.