2008 Ford F-250 Super Duty Fx4 Tire Sizes

Select a box to get your vehicle's tire size.

2008 Ford F-250 Super Duty FX4 4x4 Crew Cab

Alternate Tire Size (Show Details)
LT265/70R17/ 121R
LT
This letter indicates the intended use of the tire.
  • P = Passenger Car
  • LT = Light Truck
  • C = Commercial Vehicle
265
This number indicates that your tire has a width of 265 millimeters.
70
This number indicates that your tire has an aspect ratio of 70%.  This means that your tire's sidewall height (from the edge of the rim to the tire's tread) is 70% of the width.
R
This letter indicates how your tire was constructed.  Radial is the standard construction method for about 98% of all tires sold today.
  • R = Radial
  • B = Bias Belt
  • D = Diagonal
17
The tire size was designed to fit rims that are 17 inches in diameter.
121
This tire has a load index of 121, which means it's capable of carrying a load of 3197 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 106 mph (170 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

Original Tire Size (Show Details)
LT265/70R17/ 121S
LT
This letter indicates the intended use of the tire.
  • P = Passenger Car
  • LT = Light Truck
  • C = Commercial Vehicle
265
This number indicates that your tire has a width of 265 millimeters.
70
This number indicates that your tire has an aspect ratio of 70%.  This means that your tire's sidewall height (from the edge of the rim to the tire's tread) is 70% of the width.
R
This letter indicates how your tire was constructed.  Radial is the standard construction method for about 98% of all tires sold today.
  • R = Radial
  • B = Bias Belt
  • D = Diagonal
17
The tire size was designed to fit rims that are 17 inches in diameter.
121
This tire has a load index of 121, which means it's capable of carrying a load of 3197 pounds (1450 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 112 mph (180 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

2008 Ford F-250 Super Duty FX4 4x4 Super Cab

Alternate Tire Size (Show Details)
LT265/70R17/ 121R
LT
This letter indicates the intended use of the tire.
  • P = Passenger Car
  • LT = Light Truck
  • C = Commercial Vehicle
265
This number indicates that your tire has a width of 265 millimeters.
70
This number indicates that your tire has an aspect ratio of 70%.  This means that your tire's sidewall height (from the edge of the rim to the tire's tread) is 70% of the width.
R
This letter indicates how your tire was constructed.  Radial is the standard construction method for about 98% of all tires sold today.
  • R = Radial
  • B = Bias Belt
  • D = Diagonal
17
The tire size was designed to fit rims that are 17 inches in diameter.
121
This tire has a load index of 121, which means it's capable of carrying a load of 3197 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 106 mph (170 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

Original Tire Size (Show Details)
LT265/70R17/ 121S
LT
This letter indicates the intended use of the tire.
  • P = Passenger Car
  • LT = Light Truck
  • C = Commercial Vehicle
265
This number indicates that your tire has a width of 265 millimeters.
70
This number indicates that your tire has an aspect ratio of 70%.  This means that your tire's sidewall height (from the edge of the rim to the tire's tread) is 70% of the width.
R
This letter indicates how your tire was constructed.  Radial is the standard construction method for about 98% of all tires sold today.
  • R = Radial
  • B = Bias Belt
  • D = Diagonal
17
The tire size was designed to fit rims that are 17 inches in diameter.
121
This tire has a load index of 121, which means it's capable of carrying a load of 3197 pounds (1450 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 112 mph (180 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.