Caravan or trailer tyres are subject to the same legal standards as any vehicle on UK roads. This guide explains the legal tyre tread limit for caravans and trailers, why maintaining 1.6mm tread depth is essential for safety and compliance, and when it’s time to replace your tyres before your next journey.
Here in the UK, we love a staycation. As such, the sight of caravans on the road, ahead of long weekends and throughout the spring and summer months, has become commonplace up and down the full extent of the country.
And that’s not all. With so many farms spread out across the UK, livestock and agricultural trailers are just as common – not to mention the industrial trailers used by countless companies and organisations for quick transportation.
In short, passenger vehicle drivers should be more than used to sharing the road with vehicles which are towing caravans and trailers. But what are the specifics of maintenance when it comes to these tow loads – and what is the legal tyre tread limit for these loads?
What is Tyre Tread Depth?
Before we go into the specifics of towable vehicles, let’s look a little more at what tyre tread depth is and why it’s important.
The tread on your tyres is measured from the outer surface of the rubber to the inner grooves of the tread pattern. Most new tyres come with a tread depth of around 8mm, with this gradually wearing down over time and with continued use.
The tread on your tyres is responsible for creating traction between the tyres and the road surface that you’re driving on. Tread patterns differ between winter and summer tyres, with some designed to displace surface water while others help to navigate bumps and obstacles in the road.
All things considered, it’s the tread of your tyres which is responsible for ensuring that you are able to control and handle your vehicle in all conditions and on all road surfaces.
What is the Minimum Tread Depth in the UK?
The minimum tread depth on all tyres of your car or vehicle is 1.6mm. Any tyres with a tread that falls under 1.6mm are considered illegal and unsafe to drive on – and can culminate in points on your licence and hefty fines if you are caught driving on illegal tyres.
Contrary to popular belief, this minimum tread depth spans both the vehicle that you are driving, and any towing vehicles that you have attached to your vehicle. As such, all trailers and caravans need to meet the same standards, with a minimum tread depth of at least 1.6mm to be considered legal.
