2007 Hummer H3 Tire Size
Choose the correct rim size for your 2007 Hummer H3. Then pick the correct stock tire size from the left to get a detailed explanation of the tire code. If you don't know the correct stock tire size, check the inside of your driver side door or owner's manual.
Front and Rear LT285/75R16/C 116 


LT 
This letter denotes the intended use of the tire.


285 
This number indicates that your tire has a width of 285 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 213.75 millimeters. 

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


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 carrier heavier loads. 

116 
This tire has a load index of 116, which means it's capable of carrying a load of 2750 pounds (1250 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 Q, which means 99 mph (160 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. 