Sunnies generally run a bigger offset than standard so they will give you more clearance on the inside providing you run the same size tyre.
I'll agree with this in what I've found, have an Arrow trailer with 15" sunnnies and have swapped them out and put them on the Bravo to run some miles of them before putting them aside and running Bravo rims (Bridgestone Desert Duellers) for all 6 rims on the ground,
the 15" tyres look good and would be good for sand, but are just inside the flares and maybee only just legal (load rating is ok), but they are only 2 ply on the wall and wouldn't trust them on a trip, the Duellers are 8 ply wall
thanks for the heads up , will now double check the inside clearance on the full travel on the trailer (even tho i just had 2 rims powdercoated to look good)
cheers
Garry