That would be a custom job, as well as overkill.  All the light
utility trailer wheels I've seen are four bolt.

Incidentally, mine came with plans for a stake body with odd metric
dimension for the uprights that turn out to be the actual size of
"2x4" (1.5x3.5) lumber.  Rather than the lumber they specified for
the rails, with bolted connections, I used strapping, with
trumpet-head utility screws for connections.  The strapping is
marginal and the screws break off, so better to do it their way.  If
you put the rails on the inside you can get a big bag (meant as a
disposable dumpster) for $30 from Home Depot etc. that will just fit
over to make a tailored (but not waterproof) cover  which is great
for loose loads.  ?Bagster?  ?Spray on rubberized undercoating to
waterproof?  It's intentionally porous so that water won't collect in
it in dumpster service. OTOH if you put the rails to the outside or
raise the bottom rail up it will hold 4x8 sheet goods flat.

Yrs,
d

At 13:31 11/14/2016, Dan N wrote:
>thanks a lot folks for the advice...
>
>I am looking for a 8x4 utility trailer and I am wonder if I can put the 14"
>vanagon steel wheel on it or not...
>
>dan