Mercedes-benz M-Class 2006 Owners Manual User Manual download pdf (Page 357)

356

Operation

Tires and wheels

General:

Depending on the design standards used,

the tire size molded into the sidewall may

have no letter or a letter preceding the tire

size designation.

No letter preceding the size designation

(as illustrated above): Passenger car tire

based on European design standards.

Letter “P” preceding the size designation:

Passenger car tire based on U.S. design

standards.

Letter “LT” preceding the size designation:

Light Truck tire based on U.S. design

standards.

Letter “T” preceding the size designation:

Temporary spare tires which are high

pressure compact spares designed for

temporary emergency use only.

Tire width

The tire width 1 (

컄 page 355) indicates

the nominal tire width in mm.

Aspect ratio

The aspect ratio 2 (

컄 page 355) is the

dimensional relationship between tire

section height and section width and is

expressed in percentage. The aspect ratio

is arrived at by dividing section height by

section width.

Tire code

The tire code 3 (

컄 page 355) indicates

the tire construction type. The “R” stands

for radial tire type. Letter “D” means diag-

onal or bias ply construction; letter “B”

means belted-bias ply construction.

At the tire manufacturer’s option, any tire

with a speed capability above 149 mph

(240 km/h) can include a “ZR” in the size

designation (for example: 245/40 ZR 18).

For additional information, see “Tire speed

rating” (

컄 page 357).

Rim diameter

The rim diameter 4 (

컄 page 355) is the

diameter of the bead seat, not the

diameter of the rim edge. Rim diameter is

indicated in inches (in).

Tire load rating

The tire load rating 5 (

컄 page 355) is a

numerical code associated with the

maximum load a tire can support.

For example, a load rating of 91 corre-

sponds to a maximum load of 1356 lbs

(615 kg) the tire is designed to support.

See also “Maximum tire load”

(

컄 page 361) where the maximum load as-

sociated with the load index is indicated in

kilograms and lbs.

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