2005 Mercury Mountaineer Tire Size
Choose the correct rim size for your 2005 Mercury Mountaineer. 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 P235/70R16 104 


P 
This letter denotes the intended use of the tire.


235 
This number indicates that your tire has a width of 235 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 164.50 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. 

104 
This tire has a load index of 104, which means it's capable of carrying a load of 1980 pounds (900 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 S, which means 112 mph (180 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. 