[GTX JOHN]

16 inch are a huge improvement as already stated!

However, many if not most manufacturers do NOT have
room forothe taller tires on their standard trailers my son tells me
and he builds and sell trailers.

Best to order the taller fenders when trailer is built to make sure.

There are some 225/15 radial load range F and G tires available
in that size if you do not have room for 16 inch. Hercules is one brand that
I remember.