Brian,
    I jacked up the trailer and loosened four 13/16 bolts.  The bolt holes are just a little larger than the bolts.  In my case, I had 7/16 of an inch clearance between the wheel and frame member on curb side, about an inch on the other side.  Now, it measures just a hair under 3/4 of an inch on both sides.  Measurement taken with wheels on ground with full trailer weight.  Good luck.  George