How Much Does A Tank Trailer Hold?

The trailer's capacity is controlled by the max gross vehicle weight of 80,000 lbs for trucks in most of the states across the United States. Small tanker trucks have a maximum capacity of 1,000 to 3,000 gallons, while large tankers have a maximum capacity of 11,600 gallons. However, the maximum capacity of a tanker truck depends on the density of the liquid being transported, explains Trailers of Texas tanker expert Nick Harmon. Larger tankers average 5,500 to 11,600 US gallons for lighter weight products vs smaller tankers which average 3,000 to 5,400 gallons for heavier products.