Trailer Tires for a Boston Whaler

My father just bought a small 16' Boston Whaler. He has to tow it from CT to FL. It currently has 4.80 x 12" on a 5 x 4.5 bolt circle tires on it. He wants to try and put 13" tires/rims on there since he worried about towing all the way to FL.

I told him the 1" would probably not make any difference. I said he should probably go to the 5.30 x 12" instead of the 13". The 13" should fit under the fender but there's more chance of rubbing.

Any thoughts?

Mark, as long as you go with high quality trailer tires with an appropriate load rating, he'll be fine. Also be sure to run the recommended pressure- stay on the high side to be safe.