2018 Ford F-350 Super Duty Tire Size

Your Ford was manufactured with different tire sizes.  To determine the best tire size for your specific 2018 Ford F-350 Super Duty, we first need to determine your rim size.  Please review the information below.

How to Determine Rim Size

Check your existing tires.  Your Ford F-350's rim size is the number to the right of the R.  In the example pictured here, the tire size fits 16-inch rims.

Rim Size Selection

Now that you know your rim size, make a selection below to filter your results.

17-Inch Rims

2018 Ford F-350 Super Duty

 

There are multiple tire sizes for your 2018 Ford F-350 Super Duty 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 2018 Ford F-350 Super Duty.

Trim Options:

King Ranch 4x2 (DRW)King Ranch 4x4 (DRW)King Ranch 4x4 (DRW) w/Snow Plow Pkg.Lariat 4x2 (DRW)Lariat 4x4 (DRW)Lariat 4x4 (DRW) w/Snow Plow Pkg.Platinum (DRW)XL 4x2 (DRW)XL 4x4 (DRW)XL 4x4 (DRW) w/Snow Plow Pkg.XLT 4x2 (DRW)XLT 4x4 (DRW)XLT 4x4 (DRW) w/Snow Plow Pkg.

LT245/75R17/E 118R

Simplified Size:  245-75-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 Ford F-350 Super Duty is LT245/75R17/E 118R.  A color-coded explanation of the 2018 Ford F-350 Super Duty'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.

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
17

The tire size was designed to fit rims or wheels that are 17 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.

118

This tire has a load index of 118, which means it's capable of carrying a load of 2904 pounds (1320 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

R

This tire has a speed rating of R, which means 105 mph (170 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

Trim Options:

King Ranch 4x2 (DRW)King Ranch 4x4 (DRW)King Ranch 4x4 (DRW) w/Snow Plow Pkg.Lariat 4x2 (DRW)Lariat 4x4 (DRW)Lariat 4x4 (DRW) w/Snow Plow Pkg.Platinum (DRW)XL 4x2 (DRW)XL 4x4 (DRW)XL 4x4 (DRW) w/Snow Plow Pkg.XLT 4x2 (DRW)XLT 4x4 (DRW)XLT 4x4 (DRW) w/Snow Plow Pkg.

LT245/75R17/E 118S

Simplified Size:  245-75-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 Ford F-350 Super Duty is LT245/75R17/E 118S.  A color-coded explanation of the 2018 Ford F-350 Super Duty'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.

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
17

The tire size was designed to fit rims or wheels that are 17 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.

118

This tire has a load index of 118, which means it's capable of carrying a load of 2904 pounds (1320 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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.

Trim Options:

XL 4x2XL 4x4XL 4x4 w/Snow Plow Pkg.XLT 4x2XLT 4x4XLT 4x4 w/Snow Plow Pkg.

LT245/75R17/E 121R

Simplified Size:  245-75-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 Ford F-350 Super Duty is LT245/75R17/E 121R.  A color-coded explanation of the 2018 Ford F-350 Super Duty'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.

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
17

The tire size was designed to fit rims or wheels that are 17 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.

121

This tire has a load index of 121, which means it's capable of carrying a load of 3190 pounds (1450 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

R

This tire has a speed rating of R, which means 105 mph (170 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

Trim Options:

XL 4x2XL 4x4XL 4x4 w/Snow Plow Pkg.XLT 4x2XLT 4x4XLT 4x4 w/Snow Plow Pkg.

LT265/70R17/E 121R

Simplified Size:  265-70-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 Ford F-350 Super Duty is LT265/70R17/E 121R.  A color-coded explanation of the 2018 Ford F-350 Super Duty's tire size is shown below.

LT

This letter denotes the intended use of the tire.

PPassenger Vehicle
LTLight Truck
CCommercial Vehicle
265

This number indicates that your tire has a width of 265 millimeters.

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 185 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
17

The tire size was designed to fit rims or wheels that are 17 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.

121

This tire has a load index of 121, which means it's capable of carrying a load of 3190 pounds (1450 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

R

This tire has a speed rating of R, which means 105 mph (170 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

18-Inch Rims

2018 Ford F-350 Super Duty

 

There are multiple tire sizes for your 2018 Ford F-350 Super Duty 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 2018 Ford F-350 Super Duty.

Trim Options:

King Ranch 4x2King Ranch 4x4King Ranch 4x4 w/Snow Plow Pkg.Lariat 4x2Lariat 4x4Lariat 4x4 w/Snow Plow Pkg.XL 4x2XL 4x4XL 4x4 w/Snow Plow Pkg.XLT 4x2XLT 4x4XLT 4x4 w/Snow Plow Pkg.

LT275/65R18/E 123S

Simplified Size:  275-65-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 Ford F-350 Super Duty is LT275/65R18/E 123S.  A color-coded explanation of the 2018 Ford F-350 Super Duty's tire size is shown below.

LT

This letter denotes the intended use of the tire.

PPassenger Vehicle
LTLight Truck
CCommercial Vehicle
275

This number indicates that your tire has a width of 275 millimeters.

65

This number means that your tire has an aspect ratio of 65%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 65% 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
18

The tire size was designed to fit rims or wheels that are 18 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.

123

This tire has a load index of 123, which means it's capable of carrying a load of 3410 pounds (1550 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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.

Trim Options:

King Ranch 4x4King Ranch 4x4 w/Snow Plow Pkg.Lariat 4x4Lariat 4x4 w/Snow Plow Pkg.XL 4x4XL 4x4 w/Snow Plow Pkg.XLT 4x4XLT 4x4 w/Snow Plow Pkg.

LT275/70R18/E 125R

Simplified Size:  275-70-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 Ford F-350 Super Duty is LT275/70R18/E 125R.  A color-coded explanation of the 2018 Ford F-350 Super Duty's tire size is shown below.

LT

This letter denotes the intended use of the tire.

PPassenger Vehicle
LTLight Truck
CCommercial Vehicle
275

This number indicates that your tire has a width of 275 millimeters.

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 192 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
18

The tire size was designed to fit rims or wheels that are 18 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.

125

This tire has a load index of 125, which means it's capable of carrying a load of 3630 pounds (1650 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

R

This tire has a speed rating of R, which means 105 mph (170 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

20-Inch Rims

2018 Ford F-350 Super Duty

 

The original tire size for your 2018 Ford F-350 Super Duty is listed below. Tap on the box to view a color-coded explanation of your Ford F-350's' tire size.

Trim Options:

King Ranch 4x2King Ranch 4x4Lariat 4x2Lariat 4x4LimitedPlatinum

LT275/65R20/E 126R

Simplified Size:  275-65-20

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 Ford F-350 Super Duty is LT275/65R20/E 126R.  A color-coded explanation of the 2018 Ford F-350 Super Duty's tire size is shown below.

LT

This letter denotes the intended use of the tire.

PPassenger Vehicle
LTLight Truck
CCommercial Vehicle
275

This number indicates that your tire has a width of 275 millimeters.

65

This number means that your tire has an aspect ratio of 65%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 65% 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
20

The tire size was designed to fit rims or wheels that are 20 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.

126

This tire has a load index of 126, which means it's capable of carrying a load of NaN pounds (undefined kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

R

This tire has a speed rating of R, which means 105 mph (170 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.