Advantages: Price weight length and ability to expand areas of camping Disadvantages Size/space lack of redundancy in case of a flat Carrying capacity (in some cases) I just bought an ...
I would think the 15 inch tires would be more substantial then 2 light duty 13" tires and more availability. Never had a single axle RV but the boat trailer was a single axle and it was more difficult to back.
I'm looking at a very small TT for overnights on long trip and thought of a single axle.