Mercedes-Benz GLC : Tire labeling / Tire size designation, load-bearing capacity, speed rating and load index

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) :

• Without: passenger vehicle tires according to European manufacturing standards.
• "P": passenger vehicle tires according to US manufacturing standards.
• "LT": light truck tires according to US manufacturing standards.
• "T": compact emergency spare wheels with high tire pressure that are only designed for temporary use in an emergency.

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:

• Maximum permissible load on the Tire and Loading Information placard
• Maximum tire load
• Load index

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.