All courses › Car licence (class B) › How heavy a trailer may you tow?

How heavy a trailer may you tow?

With class B you may always tow a trailer with a permitted total weight up to 750 kg. A heavier trailer is allowed as long as the permitted total weights of car and trailer together are at most 3500 kg. Otherwise you need B96 (up to 4250 kg) or BE. The weights are in the registration certificates. Also check how heavy a trailer the car is approved to tow.

Try it yourself

How heavy do you get in a crash?

m_{\text{car}} + m_{\text{trailer}} \le 3500\ \text{kg}

the class B rule when the trailer is over 750 kg

Symbols

$m_{\text{car}}$	permitted total weight of the car	kg
$m_{\text{trailer}}$	permitted total weight of the trailer	kg

Example

The car has a permitted total weight of 2100 kg and the trailer 1300 kg.

$2100 + 1300 = 3400 \le 3500$ , so you may tow it with class B.

With a trailer the braking distance gets longer and turns get wider. Keep a bigger gap, and check the coupling, cable and lights before you set off.

Practise the vehicle, load and trailer for free →

← Securing your load · Understeer and oversteer →

Part of Car licence (class B): The vehicle, load and trailer.