WARNING Risk of injury through exceeding the specified tire load-bearing capacity or the permissible speed rating
Exceeding the specified tire load rating or the permissible speed rating may lead to tire damage and to the tires bursting.
Therefore, only use tire
types and sizes
approved for your vehicle model.
Observe the tire load
rating and speed
rating required for your vehicle.
First letter(s)
Nominal tire width in
millimeters
Aspect ratio in %
Tire code
Rim diameter
Load-bearing index
Speed rating
Load index
The data shown in the illustration is example data.
Information about reading tire data can be obtained from any qualified specialist workshop.
First letter(s) :
Aspect ratio :
Ratio between tire height and tire width in percent (tire height divided by tire width).
Tire code (tire
type):
"R" radial tire
"D": bias ply tire
"B": bias belted tires
"ZR": radial tire with a maximum speed above 149 mph (240 km/h) (optional)
Rim diameter :
The diameter of the bead seat (not the diameter of the rim flange). The rim diameter is specified in inches (in).
Load-bearing index :
Numerical code that specifies the maximum load-bearing capacity of a tire (e.g. "91" corresponds to 1356 lbs (615 kg)).
The load-bearing capacity of the tire must be at least half the gross axle weight rating of your vehicle. Do not overload the tires by exceeding the specified load limit.
See also:
Speed rating :
Specifies the approved maximum speed of the tire.
An electronic speed limiter prevents your vehicle from exceeding a speed of 130 mph (210 km/h).
Make sure that your tires have the required speed rating. You can obtain information on the required speed rating from an authorized Mercedes-Benz Center.