2005 Hummer H2 Tire Size
The original tire size for your 2005 Hummer H2 is listed below. Tap on the box to view a color-coded explanation of the best Hummer H2 tire size.
The original tire size for your 2005 Hummer H2 is LT315/70R17/D 121R. A color-coded explanation of the 2005 Hummer H2's tire size is shown below.
This letter denotes the intended use of the tire.
This number indicates that your tire has a width of 315 millimeters.
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 220 millimeters.
This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
The tire size was designed to fit rims or wheels that are 17 inches in diameter.
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.
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.
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.