Many drivers are used to replacing their tires one or two at a time. This formula is comfortable from a budget perspective as buying a full set of tires is pretty pricey. In such cases, drivers may encounter difficulties in finding tires identical to the existing ones. Thus, drivers wonder how "healthy" and acceptable it is to mix different tires on their vehicles. Here we are referring to different brands, different tread patterns, or even different tire sizes, in some cases.
This concern is quite popular among drivers. We thought it would be useful to bring some clarity to it. In this section, we will talk about tire mixing and when it is acceptable. As a general rule, manufacturers do not embrace the idea of tire mixing. This means that all 4 tires should always be identical from size to brand.
As a bare minimum, however, drivers must ensure that at least the speed and load ratings, as well as the tire size, are the same type. Exceptions are not accepted and more than that - it is a legal requirement in certain countries. This is because these attributes are directly proportional to the driver's safety. And when it comes to safety, exceptions are pointless.
Mixing Brands And Tread Patterns
NeoTires specialists encourage the installation of 4 identical tires starting with the brand and ending with all their ratings. This offers the highest degree of safety in all scenarios. Identical tires work for the optimal performance of the vehicle. When tires differ in tread pattern and especially in size, there might be a performance conflict that leads to a poor driving experience.
However, sometimes it might be tough changing all 4 tires at once, for whatever reasons. What can we do in such a context? The aspects that you can sacrifice under these conditions are the tire brand and their tread pattern. That is, mixing brands and patterns is an option, but not the most recommended one.
Mixing tire brands and patterns is only acceptable when fitting 2 tires of the same kind on each of the axles. That is, the tires on the front axle must be identical in all respects, and the rear tires as well. But, they don't need to be identical between the axes. This alternative scenario is generally accepted but not recommended as the first choice. For optimal performance and driving safety, industry experts opt for 4 identical tires.
Can I Mix Tires With Different Load and Speed Indexes?
Again, the number one rule is to opt for 4 tires with the same load and speed ratings. This ensures optimal functioning and guaranteed performance in most cases, in the absence of underlying problems. However, there is room for exceptions that should not somehow impact the performance of the vehicle.
So, different speed and load indexes between tires are generally accepted whenever the ratings are not lower than the minimum threshold recommended by the manufacturer. As in the case of different brands and patterns, you should mount tires with identical speed/load index on the same axle. Also, tires with a higher index should always go on the rear axle.
Can I Mix Tires With Different Tread Depths?
As mentioned previously, the optimal scenario is to go for 4 tires at once. But if only 2 need replacement while the other 2 are still viable, here is what you can do. First of all, the 2 new tires will have a different tread depth than the 2 older ones. So, coupling them in pairs is not recommended. What you have to do is to position 2 identical tires on the same axle.
As a general guideline, it's ok to mix different tread depths, but you have to keep in mind that the shallowest ones should be mounted on the front axle. This is the most important recommendation in this scheme. So, the new tire pair should be mounted on the rear axle, regardless of the traction type of your vehicle.
This rule is imminent because you cannot count on older tires if you leave them on the rear axle. These will provide less grip and will not be able to mitigate potential oversteering in wet or slippery conditions. That's why the tires with a deeper tread should be in the back.
Still, we do not rule out that you will meet specialists who will recommend fitting new tires specifically on the front axle, especially if the vehicle is a front-wheel-drive. It is not a wrong recommendation, but several tests still suggest that positioning on the rear provides more efficiency and safety.
When Tire Mixture Is Fully Approved?
Certain manufacturers produce specific vehicles with particular technical characteristics. Consequently, they might adjust the size of the tires according to these particularities. As such, the front tires might have a different size than the rear ones and this is a factory attribute.
Consequently, the vehicle owner should keep in mind these special considerations every time he changes the tires. The right way to go here is to strictly follow the manufacturer's recommendations regarding tire sizes.
Bottom Line
There is one important note to keep in mind: matching all 4 tires is the best thing you can do for your performance and safety when driving. It is not critical if you deviate from this rule, but it is essential to take into account the small specifications mentioned above when the matching of 4 tires is not possible. Make sure that at least the tires on each axle are identical, that the new ones are on the rear axle, or that the ones with higher speed and load indexes are also on the rear axle.
These are the basic recommendations that every driver should consider. If you plan other schemes, you must first consult with a specialist. It is best to follow the manufacturer's recommendations that take into account the construction of the tire, its weight, and its specifics.
Mixing Tires: FAQs
Do All Four Tires Need to Match?
For safety and performance reasons, it is highly recommended that all 4 tires match. However, it is not mandatory. What really matters is that at least the tires on the same axle are identical. This means the same tread, the same depth, the same size, and the same speed/load indexes as a bare minimum.
Do You Need Identical Tires on the Same Axle?
For safety and performance reasons, tires should be identical on the same axle. This means the same tread type, the same depth, size, speed, and load indexes. There might be exceptions when different load and speed ratings are accepted. In such cases, tires with a higher index are mounted on the rear axle. Either way, the tires must be as identical as possible on the same axis to exclude performance and safety deficiencies.
Can I Replace A Single Tire?
Technically, you can replace a single tire but it is not the most recommended option. This can have negative effects on gear ratios, tire treadwear, suspension, or transmission, especially if it is not mounted correctly. Ideally, it would be good to replace at least two tires on the same axle. If, however, this scenario is not possible for various reasons, at least reduce the risks through the following:
-couple the new tire with the one that has the deepest tread of the remaining 3. The new tire has an expressive tread so you have to pair it with one that is as close as possible to it;
-make sure that the new tire lies on the rear axle unless the specialist recommends otherwise.
The new tire has an expressive tread so you have to pair it with one that is as close as possible to it. Mounting healthier tires on the rear delivers better hydroplaning control and better handling. Also, it helps in avoiding oversteering on slippery and wet surfaces. Mounting deeper treads on the front axle is known to be beneficial for a shorter stopping distance. However, the benefits of mounting on the rear axle are better unless the tire service professional does not consider otherwise.
Why Trust NeoTires?
Tires have been our object of study for more than 5 years. We are passionate about this science and especially about the technologies that transform tires into attributes that greatly influence the performance of vehicles in various conditions. Thus, we have come to know this industry well and can help you find the right tires for your specific needs.
Here you can find a wide variety of reputable products at comfortable prices. Also, you can find here qualified assistance in any tire-related matter. Last but not least, you are always welcome for expert tips and informational support when you want to improve your driving experience. While we cannot change the conditions in which you drive, let us help you find the right tires for them. You can trust our qualified assistance. Drive safe and choose your tires wisely!