I have a 2000 2-Horse Valley Stock trailer, gooseneck, with a 4' dressing room, bought used. It currently has Bias-ply 7.00-15LT tires on it. Trailer hasn't been used much, but want to replace the tires just due to their age. Discount Tire tells me there are no radial trailer tires that match up to that size, and suggested going back with Carlisle/Carlstar bias-plys. Anyone have any experience with this? I would think the radials would ride better. Thoughts? Options? Thank you!!!