Switching from ST to LT tires

Bill - the weight ratings chart is helpful. It says I need the D rating to get the weight capacity that I would be comfortable with.

I looked at the Discount Tire site again and still don't see the listing for the ST225 size - I even changed locatoins thinking that it might be an availability issue here that was the problem. But even picking L.A. area only showed the ST205.

I may have to call the dealer here to see if he can get the D rated ones.

Thanks for the feedback.
Alan