How Old Are My Caravan Tyres, and How Would I Even Know?

Caravans spend long periods parked up, which means their tyres often age long before the tread wears out. Unfortunately, many caravan owners only discover tyre issues when they prepare for their first trip of the season (or worse, after they've set off).

Understanding tyre age, legal requirements, and how to check the manufacturing date can help ensure your caravan remains safe, roadworthy, and compliant with UK law.

Legal responsibilities for caravan tyres in the UK

Although caravans and most trailers do not require an MOT, they must still be roadworthy when used on the public highway.

The most relevant laws include:

• Road Traffic Act 1988, Section 40A – It is an offence to use a vehicle or trailer in a condition that could cause danger of injury.

• Road Vehicles (Construction and Use) Regulations 1986 – These regulations require that vehicles and trailers are maintained in safe condition, including tyres suitable for use on the road.

• Tyres must meet the same basic legal standards as car tyres, including minimum tread depth of 1.6 mm across the central three-quarters of the tread, be free from cuts or bulges, and be inflated to the correct pressure.

If a tyre is defective, both the driver and vehicle owner may be liable, with potential penalties including fines and penalty points per tyre.

From an insurance perspective, most policies also require your vehicle and caravan to be maintained in a roadworthy condition. If a collision occurs and defective tyres are found to be a contributing factor, insurers may refuse to cover the claim.

Weight ratings and why caravan tyres can be expensive

Caravan tyres may look similar to car tyres, but they are engineered differently. A caravan tyre must support the entire static weight of the caravan and its load, often for extended periods while stationary.

Key factors affecting caravan tyre cost include:

• Higher load ratings to support heavy static loads

• Reinforced sidewalls to reduce flex when towing

• Higher inflation pressures compared with typical car tyres

• Lower production volumes than standard passenger tyres

Caravan tyres must always have a load rating sufficient for the maximum authorised mass (MAM) of the caravan, ensuring the tyres can safely carry the weight of the vehicle and its contents.

Why tyre age matters more than tread depth

Unlike cars, caravans often cover relatively few miles each year. That means the tread may look almost new, even when the tyre is many years old.

However, rubber compounds naturally degrade over time due to:

• UV exposure

• Temperature changes

• Ozone

• Long periods under load while stationary

Industry guidance generally recommends replacing caravan tyres at around 5 years old and avoiding using them beyond 7 years, regardless of tread depth.

How to check the age of your caravan tyres

Every tyre carries a manufacturing code stamped on the sidewall known as the DOT code (Department of Transportation marking). This includes a four-digit date code that reveals exactly when the tyre was made.

Finding the code

Look on the tyre sidewall for the letters “DOT” followed by a series of numbers and letters. The last four digits indicate the manufacturing date. The code is often found in a small 'oval shape'

The final four numbers break down as:

• 08 – Week of manufacture

• 20 – Year of manufacture

So this tyre was made in week 08 of 2020.

A few important points:

• The full DOT code may appear on only one sidewall, so you might need to move the caravan or check the inside face of the tyre.

• Tyres with a three-digit date code were manufactured before 2000 and should be replaced immediately.

A quick tyre safety checklist before towing

Before any journey, it’s good practice to check:

• Tyre tread depth (minimum 1.6 mm)

• Correct inflation pressure for the load

• No cracks, bulges, or exposed cords

• Tyre age using the DOT code

• Load rating appropriate for the caravan weight

Regular checks are especially important after winter storage, as tyre pressures can drop and rubber deterioration may accelerate while the caravan is stationary.

Final thoughts

Caravan tyres often fail not because they are worn out, but because they are too old. Understanding the legal requirements, checking the tyre load rating, and reading the DOT date code can help you avoid dangerous failures and ensure your caravan remains roadworthy.

A quick look at the sidewall could be the difference between a safe journey and a costly roadside recovery