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Thak you for all the comments and insight, a lot of knowledgeable people on this site, I love my dual axle trailer, it came with the boat, i know it's overkill but it rides quite smooth and is still in great shape.

I will have to do some more research and price differences between the U.S. and Canada, a shopping trip might be in order.

A little more reading and difference in sidewall design in trailer tire is to support a high load but also to absorb road harshness when loaded with lighter loads.