Ever wondered how thick car tyres really are? This quick guide explains tyre thickness, how it relates to tread depth, and why both are vital for grip, comfort, and safety on the road. Learn the standard measurements for new tyres and when it’s time to replace yours to stay safe and legal.
There are so many variables when it comes to car tyres, meaning it can be hard to keep up and track down the right tyres for your vehicle.
One factor that can sometimes be confusing is tyre thickness – with drivers wondering what they should be looking for and how the thickness of a tyre impacts driving. However, it all becomes simpler when you realise that the thickness of a tyre is the same as the tread depth of a tyre.
Why is Tyre Thickness Important?
The importance of tyre thickness becomes apparent as you consider the impact of tread depth on vehicle safety, control, comfort, and performance.
The more tread depth / thickness a tyre has, the better grip it exerts between tyre and road surface. This in turn creates better traction, which is integral for safe handling, cornering, and effective braking.
As tread depth starts to wear down, the tyres become thinner and at higher risk of damage caused by potholes and debris on the road. This is because there is less cushioning and rubber to absorb the impact of the road, affecting comfort and stability.
So, What Are the Tyre Thickness Measurements for a New Tyre?
New tyres tend to have a tread depth of around 8-9mm. The total tyre thickness is therefore around 10mm once you add the base layer that sits underneath the tread grooves.
As the tyre is used, this continues to wear down until you reach that 1.6mm minimum limit – prior to which you should already have sourced new replacement tyres for a quick switch.
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