Testing 13″ and 14 ” wheels on my trailer. Adjustable spindle arm angles give me some flexibility. One consideration: 14 ” wheels put me just over width limit requiring extra lights in this jurisdiction.
13″ wheels give me 11″ ground clearance and 39″ counter height even with 8 inch underfloor storage box.
Inside I have added buttress blocks inside my storage compartments. These are filleted and taped on all sides and greatly increase rigidity of my double floor and also support my interior hatch lids:
