Hello! We just bought our first PUP last week, and I have really appreciated all of the learning opportunities here! We are making a list of needs before taking her out, and tires are #1. The tires on it are the originals, manufactured in April 1997! Yikes! We aren't experienced in purchasing trailer tires and would REALLY appreciate your recommendations! Our PUP is a 1997 Coleman Fleetwood (yes ABS roof; already repaired). It weighs 2090 lb. and has a GVWR of 2390lb. Any recommendations on type, brand, place of purchase, etc? The current tires read: B78-13ST ST175/80D13 Load range c. Max load 1360lb Tread area 4 plies, side wall 2 plies nylon 50PSI MAX (rim and tire) Thank you all so much!