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Automotive glossary

Maximum Roof Load

The maximum roof load is the heaviest weight the car roof may carry while driving, including the rack or box itself.

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What is Maximum Roof Load?

The value is in the owner’s handbook. For many cars it is somewhere between about 50 and 100 kg. The weight of bars and roof box counts towards the limit. Some roof boxes show their own weight and load limit on a label inside the lid.

How it works

A high load raises the centre of gravity and stresses the roof structure in braking and cornering.

Why it matters for your car

Drive more slowly and gently with a loaded roof. Keep heavy items in the boot rather than on the roof.

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