The single motorcycle trailer is strong enough to carry any production motorcycle builttoday and it can handleup to a 71" wheelbase! Extensions areavailable for choppers and even the Boss Hoss and wider rear tracks are available to accommodate up to a 300 tire. Its main construction is 2 1/2" and 2" structural steel (1/2" and 3/16" thick wall steel, that's material they build buildings out of), with a 3500 lb. 2" coupler, 1000 lb. spindle on each side, D rated 8-ply tires and bearings rated at 7500 rpm!! A 12"-14" ball heightputs this motorcycle trailer at a perfect height for towing. With a 60" distance between wheels, it is extremely stable!