I dont think if it was me, I would do it, cause you gotta think, the leaf springs on a boat trailer arnt to forgiving, and the tire does alot of the work, I have a 83 celebrity, and I have 6 ply sidewall tires, and you also gotta think, your gunna hit a curb turning sometime in the future, and it will screw up your wheels..there is alot of weight on those two tires, and with lowpros dont give that much..ya it loooks cool, but the safety and money factor, that if you hit a pot hole, and blow a tire, and bend a rim, is pertty costly..( I was gunna run some 13 inch wires on my boat trailer at one time...lol..ya right..) But I did have my ranger wheels on there for a while, when I pulled it with my ranger so It matched, but I still had some heavy duty tires on the trailer...