I need to buy some new tires for my trailer. The tire size is 7.5 x 16 LT. I want used tires since it just sits but I cant find used tires this size. Just wondering if anyone knows what tires might also work. I have been reading that 235/85/16 will work but I don't know if that will work for the weight I have. The total weight with boat on it is 19000lbs the boat itself is about 13000 and the trailer is about 6000. There are 6 tires. Any opinions of what to buy or should I just spend the extra money and buy new 7.5 x 16's.