Substituting Special Trailer Tire Size ST205/75-15 for ST205/65-15 on Single Axle Trailer

Question:

Hello, I have a small 1 axle trailer it has 205/65/15 tires on it,can i put 205/75/15 trailer tires on it? Thank You.

asked by: Rick

Expert Reply:

Both trailer tire sizes you reference, ST205/65-15 and ST205/75-15 share the same width (8-inches) but have different overall diameters. So you will want to insure that your trailer wheel wells/fenders have enough clearance for the larger tire. At least 3-inches of available space above the tire surface is recommended to allow for normal suspension travel.

The ST205/65-15 has a diameter of 25-1/2-inches; the ST205/75-15 has an overall diameter of just over 27-inches. So long as you have enough room for the larger tire you'll be fine.

You can see all tires in this size on the linked page. We offer both bias ply and radial types, and several choices in weight load range, such as the Load Range C radial # TTWTRTM2057515C from Taskmaster. Always keep trailer tires fully inflated to the psi rating noted on the tire sidewall.

expert reply by: Adam R