Axle capacity of Gross Vehicle Weight Rating (GVWR) of the trailer should exceed the anticipated weight of your finished tiny house. As a general rule of thumb, a Finished tiny house weighs on average 500 to 550 lbs per linear foot of trailer length. So a finished 24 ft tiny house will average about 12,000 to 13,200 lbs, including the trailer. So the ideal trailer you buy should have a capacity that exceeds that estimate. Keep in mind, the finished weight of a tiny house varies greatly by design, so your finished tiny house may be lighter or heavier than that estimate; plan accordingly. It is always better to buy more trailer than you need rather than less. Our Axle capacities come in 3500 lbs, 5200 lbs, 6000 lbs, and 7000 lbs. The axles will always come in pairs; for a 7k Gross Vehicle Weight Rating tiny house trailer, it will consist of (2) 3,500 lbs axles. A 10k Gross Vehicle Weight Rating tiny house trailer will consist of (2) 5,200 lbs axles. A 12k Gross Vehicle Weight Rating tiny house trailer will consist of (2) 6000lbs axles. A 14k Gross Vehicle Weight Rating tiny house trailer will consist of (2) 7,000 lbs axles. A 15k Gross Vehicle Weight Rating triple-axle tiny house trailer will consist of (3) 5,200 lbs axles. A 18k Gross Vehicle Weight Rating triple-axle tiny house trailer will consist of (3) 6,000 lb axles. A 21k Gross Vehicle Weight Rating triple-axle tiny house trailer will consist of (3) 7,000 lb axles.