One of the new boats that I am looking at has 245/45R18 Goodyear Eagle Sport tires on a tandem axle. I looked them up and they have a load index of 96 (1565 lbs) and speed rating W (168 mph). They are not ST or LT tires, SL, I think. I would think that the company engineered this into their trailer. I am OCD when it comes my boats and especially making a purchase this big. I would estimate that I would tow 3000 - 4000 miles per year. Is this something to be concerned about? I do not want to buy a new boat and have tire issues that I could have changed in the beginning. I do notice that a lot of newer boat trailers are going to tires similar to these. I appreciate any input on this.