Is it possible to replace just one tire?

There is nothing more annoying than having a flat tire and finding out that it cannot be repaired. There are many reasons for this, such as a pothole, a puncture in the sidewall, etc. But is it possible to replace only one tire?

The answer: Maybe!

First of all, you have to understand that tires wear out over time. Your new tires purchased 2 years ago are no longer at their original tread value. The tread has worn out over time. So putting a new tire at 11/32 with a worn tire at 7/32 is not optimal. The rule of thumb is to not allow more than a 2/32 gap between the new and old tires.

Here are some scenarios:

 1. FWD car (front wheel drive):

• It is possible to place 1 new tire that should be positioned in the rear... Positioning it in the front will likely cause a torque effect due to the greater grip. Ideally, the replacement should be done in pairs.
• Tires on the front axle tend to wear out faster.

2. Rear-wheel drive vehicle (drive wheels at the rear of the vehicle):

• Replacement should be done in pairs to help the car maintain good handling. Changing only one front tire could have an impact on the steering, while changing only one rear tire could cause the differential to work abnormally.
• On this type of vehicle, it is the tires on the rear axle that tend to wear faster.

3. All-Wheel Drive: Things are getting tougher!

• AWD car
  Standard AWD systems are often in traction mode the majority of the time and will transfer power to the rear wheels as needed. In this case, if it is impossible to replace all 4 tires, you will have to replace 2 tires and place them on the front axle to get the best grip possible.
• All-wheel drive cars with constant grip, ex: Subaru, Audi, BMW etc. These vehicles have very sophisticated four-wheel drive systems. Unlike a standard all-wheel drive, all 4 wheels are driven at all times. Placing only 1 new tire will cause the system to constantly try to counterbalance between the new and old tire on the same axle. This will increase the risk of damaging the differentials or even the transmission. This type of vehicle should have 4 tires of identical brand and similar wear.
• Some car manufacturers may even refuse to do a warranty repair if the tires on the car are not identical.

So, it is possible to replace a single tire on a vehicle but certain conditions related to the nature of the drive system can complicate matters. Don't take the chance that your car's handling will be affected by the addition of a single unsuitable tire. Also keep in mind that a tire that was on the market 3 or 4 years ago may very well be discontinued by the manufacturer, forcing you to reconsider your purchase.

Thanks you and drive safely!