The long-term mileage performance of your tyres depends on many factors. We explain what they are, and what you can do to prolong the life of your tyres.
There are two factors that have a low- to medium-term impact on tyre mileage – tyre width and overinflation.
Tyre width: Wider tyres have a bigger contact patch with the road. This translates into lower ground pressure, which reduces tyre wear and increases the life of your tyres. However, the handling behavior of the tyre is also improved, so if you drive the car in a sporty or aggressive style, there will be some impact on tyre mileage.
If you avoid driving or turning corners too aggressively, or accelerating and decelerating too rapidly, then you can expect higher mileage from your tyres.
Overinflation: If the inflation pressure is too high for the load of the vehicle, the ground pressure will increase around the center of the tyre’s contact patch, therefore increasing wear on this part of the tyre.
The best practice is to check your tyre pressure every two to four weeks, and to follow the vehicle manufacturer’s recommendations for part and full loads when inflating your tyres.
The mid-level factors that affect tyre mileage are more diverse, but these tips for preventative maintenance can mitigate their impact.
Driven axle: Tyre wear will be higher on the driven axle of the car than on the free-rolling axle. In the case of a rear-wheel drive vehicle, there is a more balanced wear relationship between tyres on the front and rear axles. With a front-wheel drive vehicle, the wear to the front tyres is increased by the steering forces exerted on the front axle.
The best technique to prolong the life of your tyres in this instance is tyre rotation, done at regular intervals through the year, i.e. when switching from summer tyres to winter tyres.
Please note that tyre rotation patterns are more limited for tyres with a directional patten; they can only be switched from the the same positions on the front to rear axles, and vice versa – not from side-to-side.
Road surface: While driving a vehicle normally, the influence of the road surface is relatively minor. However, a rough and abrasive road surface can significantly reduce the service life of your tyres if you are also driving the car aggressively.
Our advice here is to avoid poorly maintained roads where possible, or not to go off road too often without the appropriate tyres. If rough-surfaced roads are a regular part of your journeys, then consider fitting dedicated all-terrain tyres instead.
Ambient temperature: The chemical and physical properties of summer and winter tyres are optimized for specific operating temperatures. At temperatures below 45˚F, summer tyres will wear more quickly. At temperatures above 45˚F, winter tyres will wear more quickly.
The critical point is to fit tyres that are appropriate to the season. It isn’t just a factor to prolong the life of your tyres; it will maintain the performance and safety characteristics of your car all year round.
Now we come to the most significant factors that affect tyre mileage, and here too the driver can make a difference.
Tread compound: When developing tyres, there are target conflicts between wet grip, wear, and rolling resistance, which means that one property is sometimes strengthened at the expense of another (although modern premium tyres are made with sophisticated silica tread compounds that help to mitigate the usual trade-off between wear and wet grip).
When shopping around for a new set of tyres, it helps to research the particular strengths of the tyre compound design. That way, it won’t come as a surprise when the tyres show signs of wear sooner than you might previously have thought.
Driving style: Fast and sporty driving is a significant factor in the lifespan of your tyres. Strong acceleration and braking – plus fast cornering speeds – increases tyre wear significantly.
So long as you stay within the road safety laws, we won’t lecture you about your driving style. But if you were to drive that little bit slower or accelerate with a little less power, it would go a long way toward extending the service life of your tyres.
Pressure and load: If the inflation pressure of the tyre is too low for the load of the vehicle, slip can occur in the contact patch between the tyre shoulder and the center. This increased slip leads to higher wear and a reduction in the lifespan of the tyre.
There will inevitably be trips to the hardware store or vacation road trips where the car has to carry a full load, but at all other times, don’t keep anything more than necessary in the trunk of the car. Try to keep the weight off, and adjust the tyre pressure between normal load and full load as required. Maintaining the recommended tyre pressure is also a factor in better fuel economy.
Suspension geometry: Badly adjusted steering and suspension geometry has a huge impact on the lifespan of your tyres and can typically be identifiable as irregular wear on the tyre shoulder.
If you suspect that there is a problem with either the steering or suspension, especially after an unexpected jolt like potholes in the road or bumping into a kerb, you should visit your local garage for an inspection.
Engine power: Cars with higher power and higher torque can reduce their tyre mileage over time – but this also depends on how the driver leverages the capabilities of the vehicle.
For cars with higher torque, the best option is going to be an ultra-high performance (UHP) tyre, which is specially engineered to match the capabilities of an ultra-high performance car.