Trailer Tire Availability for Pontoon Boat Trailer with 20.5x8.5x10 Tires

Question:

Hi, I have a pontoon boat trailer that needs 4 tires before I can take it from Hot Springs, AR to Lake Powell at Page, AZ just west of Four Corners. Size is 8.5x10 and 10 ply. which ones do you recommend? Thank you,

asked by: Art H

Expert Reply:

I believe you have the tire size 20.5x8.5x10 as that is a very common pontoon boat trailer size and the numbers you list happen to have most of those as well.

The closest match we are going to have is a 205/65-10 which will have an inflated diameter of 20.5 inches and a section width of 8.4 inches. They may be a little more narrow than the ones you have now. This tire size fits on a 6 inch wide wheel. Wheel width is measured on the inside where the outside edges of the tire sit.

In this size we have 4 options with different capacities

# AM1HP50 Load Range B rated for 910 pounds at 35 psi.
# AM1HP52 Load Range C rated for 1,100 pounds at 50 psi.
# AM1HP54 Load Range D rated for 1,330 pounds at 70 psi.
# AM1HP56 Load Range E rated for 1,650 pounds at 90 psi.

With trailer tires you have to keep them inflated to their max psi at all times to ensure you get the full capacity.