1991 Ford F-150 Tire Size

There are multiple tire sizes for your 1991 Ford F-150 that depend upon the trim level.  Look for your trim level below to get a color-coded explanation of your tire size.  Then pick the best tire size for your 1991 Ford F-150.

Trim Options:

Custom 4x2XL 4x2XLT Lariat 4x2

P215/75R15

Simplified Size:  215-75-15

Simplified size is useful for shopping and buying tires.

The original tire size for your 1991 Ford F-150 is P215/75R15.  A color-coded explanation of the 1991 Ford F-150's tire size is shown below.

P

This letter denotes the intended use of the tire.

PPassenger Vehicle
LTLight Truck
CCommercial Vehicle
215

This number indicates that your tire has a width of 215 millimeters.

75

This number means that your tire has an aspect ratio of 75%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 75% of the width.  In this case, the sidewall height works out to be 161 millimeters.

R

This letter denotes how your tire was constructed.  Radial is the standard construction method for about 99% of all tires sold today.

RRadial
BBias Belt
DDiagonal
15

The tire size was designed to fit rims or wheels that are 15 inches in diameter.

Trim Options:

Custom 4x2Custom 4x4Custom 4x4 (H.D. Front End)XL 4x2XL 4x4XL 4x4 (H.D. Front End)XLT Lariat 4x2XLT Lariat 4x4XLT Lariat 4x4 (H.D. Front End)

P235/75R15/XL

Simplified Size:  235-75-15

Simplified size is useful for shopping and buying tires.

The original tire size for your 1991 Ford F-150 is P235/75R15/XL.  A color-coded explanation of the 1991 Ford F-150's tire size is shown below.

P

This letter denotes the intended use of the tire.

PPassenger Vehicle
LTLight Truck
CCommercial Vehicle
235

This number indicates that your tire has a width of 235 millimeters.

75

This number means that your tire has an aspect ratio of 75%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 75% of the width.  In this case, the sidewall height works out to be 176 millimeters.

R

This letter denotes how your tire was constructed.  Radial is the standard construction method for about 99% of all tires sold today.

RRadial
BBias Belt
DDiagonal
15

The tire size was designed to fit rims or wheels that are 15 inches in diameter.

XL

The mark of XL means extra load.  A tire with this designation can handle higher inflation pressures than a regular tire, which increases its maximum load.