Preceding letter1:RWithout: passenger vehicle tires according to
European manufactu ring standards.
R"P": passenger vehicle tires according toUS
manufacturing standards.
R"LT": light truck tires according toUS manu‐
fa cturing standards.
R"T": compact emer gency spa rewheels with
high tire pressure that are only designe dfo r
te mp orary use in an emer gency.
Aspect ratio 3
:
Ra tio between tire height and tire width in per‐
cent (ti reheight divided bytire width).
Tire code 4
(tire type):R"R" radial tires
R"D": diagonal or bias-ply tires
R"B": diagonal radial tires or bias belted tires
R"ZR": radial tires with a maximum speed
abo ve149mp h(2 40 km/h) (optional) Rim diame
ter5
:
The diam eter of the bead seat (not the diame ter
of therim flange). The rim diame ter is specified
in inches (in).
Load-bearing index 6
Numerical codethat specifies the maximum
load-bearing capacity of a tire (for example, "91"
cor responds to1356 lbs (6 15kg)).
The load-bearing capacity of the tire must be at
least half the permissible gross axle load of your
ve hicle. Do not overload the tires by exceeding
th e specified load limit.
See also:
RMaximum permissible load on theTire and
Loading Info rmation placard (→page 345)
RMaximum tire load (→page 352)
RLoad ind ex
Speed rating 7
:
Specifies the appr oved maximum speed of the
tire. %
An electronic speed limite r prevents your
ve hicle from exceeding a speed of 130mp h
(2 10 km/h).
Make surethat your tires ha vetherequ ired
speed rating. You can obtain information on the
re qu ired speed rating from an au thorized
Mercedes-Benz Center.
Summer tires
Inde xS peedrating
Qu pto 100mp h (160 km/h)
Ru pto 106mp h (170 km/h)
Su pto 112mp h(1 80 km/h)
Tu pto 118mp h (190 km/h)
Hu pto 130mp h(210 km/h)
Vu pto 149mp h(2 40 km/h)
Wu pto 168mp h (270 km/h)
Yu pto 186mp h(3 00 km/h)
354
Wheels and tires
