2005 Ford F-250 Super Duty Tire Size

This letter denotes the intended use of the tire.

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

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

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.

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.

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

This letter denotes the intended use of the tire.

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

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

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.

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.

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

This letter denotes the intended use of the tire.

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

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

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.

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.

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.

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

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.

This letter denotes the intended use of the tire.

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

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

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.

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.

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.

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

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.

This letter denotes the intended use of the tire.

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

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

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.

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.

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.

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

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.

This letter denotes the intended use of the tire.

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

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

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.

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.

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.

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

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.

This letter denotes the intended use of the tire.

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

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

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.

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.

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.

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

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.