Adding big deck/ extra axle to a 5er. Carry 4 motorcycles.

4x4ord wrote:
My trailer weighs about 16500 lbs loaded with about 1200 lbs riding on the back. (weight of hitch + motorcycle lift + motorcycle) I have about 2400 lbs of pin weight. The trailer does not tow real well set up like this... I will likely be adding a third axle.

How doesn't it tow well ? Mine tows well even with the bikes on the back except if you hit "G out" bumps in the road. Then the trailer see saws too much for my liking. But it is still OK.

How are you planning to add your axle ?