Got my boat with ST215 75R14 Tires on it - Had one blow out on me last weekend coming back from the lake - so now I need new trailer tires. The spare tire that I had and put on it to get it home is a ST205 75R14 instead of a ST215, and it actually looks better on the trailer and in the wheel well. I just want to make sure these are ok for my trailer and boat since they are about $100 cheaper than if I were to have to get the ST215 tires and wheels. Looks like everything else is about the same. I am not a tire person though, can someone else shed some light on this for me please? If I can get the ST205 tires and wheels I will come out MUCH cheaper. Boat weight is about 2600 lbs I believe - its a 1985 Larson Senza boat. Can anyone help me out?