Tire Size » Mercedes-Benz » C320 » Sport » 2005

2005 Mercedes-Benz C320 Sport Tire Size

Choose the correct option for your 2005 Mercedes-Benz C320 Sport.  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.

Mercedes-Benz Logo
Coupe
Front Tire
225/45R17 91Y
225

This number indicates that your tire has a width of 225 millimeters.
45

This number means that your tire has an aspect ratio of 45%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 45% of the width.  In this case, the sidewall height works out to be 101.25 millimeters.
R

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

R Radial
B Bias Belt
D Diagonal
17

The tire size was designed to fit rims or wheels that are 17 inches in diameter.
91

This tire has a load index of 91, which means it's capable of carrying a load of 1353 pounds (615 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.
Y

This tire has a speed rating of Y, which means 186 mph (300 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.
Coupe
Rear Tire
245/40R17 91Y
245

This number indicates that your tire has a width of 245 millimeters.
40

This number means that your tire has an aspect ratio of 40%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 40% of the width.  In this case, the sidewall height works out to be 98.00 millimeters.
R

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

R Radial
B Bias Belt
D Diagonal
17

The tire size was designed to fit rims or wheels that are 17 inches in diameter.
91

This tire has a load index of 91, which means it's capable of carrying a load of 1353 pounds (615 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.
Y

This tire has a speed rating of Y, which means 186 mph (300 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.