I have an aluminum trailor and 9 times out of 10 it will float on me which makes it a pain in the arse to load the boat. Are there any tricks ya'll might have to keep it from floating long enough to get the boat on the trailor?
get a solid piece of steel of some sort and put it along the Ibeams on each side. If it only floats sometimes, it is probably when it is a litle deaper or the tires are hot and the water is colder. Air density, pressure stuff. Anyhow bolt them on and add about 50-75 lbs to the trailer so it doesnt float. We had a trailer that did this and this solved the problem.