Glossary Term

What is a MTPLM (Maximum Technically Permissible Laden Mass) in a Caravan?

MTPLM stands for Maximum Technically Permissible Laden Mass – the maximum weight your caravan is designed to carry when fully loaded. This includes the caravan itself (MiRO – Mass in Running Order), plus all passengers, luggage, food, water, gas, and any accessories. MTPLM is a critical specification for safe towing, as it determines whether your tow vehicle can legally and safely pull the caravan. UK law requires that the caravan's MTPLM does not exceed your car's towing capacity, and the 85% rule suggests keeping laden weight below 85% of your car's kerbweight for stable towing.

Advantages

Essential safety specification
Legally required for towing compliance
Helps match caravan to tow vehicle

Considerations

Can be confusing with other weight terms
May limit what you can carry
Heavier layouts mean higher MTPLM

Best For

Understanding towing requirements

Matching caravan to vehicle

Safe loading calculations

Popular Caravan Layouts

End Washroom

560 available

End Kitchen

33 available

L-Shape Lounge

4 available

Fixed Double Bed (Corner)

24 available

Twin Fixed Single Beds

49 available

End Washroom (Side Dinette)

2 available

Frequently Asked Questions

MiRO (Mass in Running Order) is the caravan base weight with standard equipment and fluids. MTPLM is the maximum total weight when fully loaded. Payload = MTPLM - MiRO.

Check your car maximum towing capacity in the handbook or VIN plate. This must equal or exceed the caravan MTPLM. The 85% rule (caravan weight vs car kerbweight) provides additional safety margin.

Some caravans can be upgraded by the manufacturer or approved dealer, but this requires proper documentation and may affect warranty. Never exceed the rated MTPLM.