What is ATM (Aggregate Trailer Mass)? What should you know about trailer ATM before you purchase a trailer?

The Aggregate Trailer Mass (ATM) is a measure of the total weight of a trailer and its load. It is the sum of the trailer’s tare weight, which is the weight of the trailer when it is empty, and the weight of the load that it is carrying.

ATM is an important factor in determining the weight capacity of a trailer and ensuring that the towing vehicle is capable of safely towing the load. The ATM should not exceed the maximum towing capacity of the vehicle or the maximum weight that the trailer is designed to carry, as exceeding these limits can result in unsafe towing conditions and potential damage to the vehicle or trailer.
