1999 GMC Sierra 2500 Tire Size

There are multiple tire sizes for your 1999 GMC Sierra 2500 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 GMC Sierra 2500.

Trim Options:

SL 4x2SLE 4x2SLT 4x2

LT245/75R16/C

Simplified Size:  245-75-16

Simplified size is useful for shopping and buying tires.

The original tire size for your 1999 GMC Sierra 2500 is LT245/75R16/C .  A color-coded explanation of the 1999 GMC Sierra 2500'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.

C

The mark of C denotes your tire's load range, or ply rating.  A load range of C means that the tire has a ply rating of 6.  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:

SL 4x2 H.D.SL 4x4SLE 4x2 H.D.SLE 4x4SLT 4x2 H.D.SLT 4x4

LT245/75R16/E

Simplified Size:  245-75-16

Simplified size is useful for shopping and buying tires.

The original tire size for your 1999 GMC Sierra 2500 is LT245/75R16/E .  A color-coded explanation of the 1999 GMC Sierra 2500'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.

E

The mark of E denotes your tire's load range, or ply rating.  A load range of E means that the tire has a ply rating of 10.  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