The original tyres for a caravan are determined by joint consultation between the caravan and tyre manufacturers and take into account all aspects of operation. Any changes in tyre size or type should not be undertaken without seeking advice from the caravan or tyre manufacturer. In some European countries, it is illegal to use replacement tyres that differ in certain respects such as size, load or speed rating, from the tyre originally fitted by the manufacturer.

It is essential that tyres of the correct specification are fitted to caravans, trailers and motorhomes. The same tyre construction type, i.e. radial or cross-ply, should be fitted to all tyres on the same axle.

Across an axle, tyres should also have an equal size, load index and speed rating with identical wheels. The same combination should apply to the spare. Tyre pressures across an axle should also be equal.

Older caravans may be fitted with cross-ply tyres that are no longer available, meaning that radial ply tyres must be fitted. If a caravan is converted from cross-ply to tubeless radial tyres, the latter must only be fitted to safety type rims, i.e. those with a hump or flat ledge on the outer bead seat. Many older caravans do not have safety type rims and the previous recommendation has been to fit tubes with radial ply tyres. Before doing so, the tyre manufacturer must be consulted, as not all radial-ply tyres are suitable for use with tubes. When travelling abroad during winter months, some country’s laws require winter tyres to be fitted to the vehicle. Even if not required by law, it is still a good practice to fit tyres that are appropriate for the road and weather conditions. If in any doubt, contact your tyre manufacturer for further advice.

It is essential that the combined tyre load capacity is sufficient for the maximum weight (MTPLM) of the caravan, but as an extra safeguard, it is strongly recommended that the MTPLM does not exceed 90% of the tyre’s load capacity.