Hello, I recently had my offer accepted on a 1985 H23 on a trailer that is a project boat. One thing I missed when I looked it over was the tire size and the boat is 2 hours away. Tires are bad. I need to order tires and take them to the boat when I go to bring it home. There's no place nearby that would have trailer tires without ordering them ahead of time. It's the standard H23 galvanized trailer. Could a H23 owner tell me what's the tire size? Thanks