1999 Ford F-250 Tire Size

There are multiple tire sizes for your 1999 Ford F-250 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 1999 Ford F-250.

Trim Options:

4x24x4Lariat 4x2Lariat 4x4XL 4x2XL 4x4XLT 4x2XLT 4x4

LT245/75R16/D

Simplified Size:  245-75-16

Simplified size is useful for shopping and buying tires.

The original tire size for your 1999 Ford F-250 is LT245/75R16/D .  A color-coded explanation of the 1999 Ford F-250's tire size is shown below.

LT

This letter denotes the intended use of the tire.

PPassenger Vehicle
LTLight Truck
CCommercial Vehicle
245

This number indicates that your tire has a width of 245 millimeters.

16

The tire size was designed to fit rims or wheels that are 16 inches in diameter.

D

The mark of D denotes your tire's load range, or ply rating.  A load range of D means that the tire has a ply rating of 8.  Letters further along in the alphabet represent stronger tires that can sustain higher inflation pressures.  Tires with higher inflation pressures can carry heavier loads.

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 183 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

Trim Options:

4x2Lariat 4x2XL 4x2XLT 4x2

P255/70R16 109S

Simplified Size:  255-70-16

Simplified size is useful for shopping and buying tires.

The original tire size for your 1999 Ford F-250 is P255/70R16 109S.  A color-coded explanation of the 1999 Ford F-250's tire size is shown below.

P

This letter denotes the intended use of the tire.

PPassenger Vehicle
LTLight Truck
CCommercial Vehicle
255

This number indicates that your tire has a width of 255 millimeters.

16

The tire size was designed to fit rims or wheels that are 16 inches in diameter.

109

This tire has a load index of 109, which means it's capable of carrying a load of 2266 pounds (1030 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

70

This number means that your tire has an aspect ratio of 70%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 70% of the width.  In this case, the sidewall height works out to be 178 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
S

This tire has a speed rating of S, which means 111 mph (180 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.