Volvo XC 90 Owner's Manual page 472

WHEELS AND TYRES
First aid kit
The first aid kit contains first aid equipment.
First-aid kit is located on the right-hand side of
the cargo area.
Related information
•
Tools in the cargo area (p. 468)
470
Size designation for wheel rim
Wheel and rim dimensions are designated in
accordance with the examples in the table
below.
All wheel rims have a dimension designations, for
example: 8Jx18x42.5.
8 Rim width in inches
J Rim flange profile
18 Rim diameter in inches
42,5 Off-set in mm (distance from wheel
centre to wheel contact surface against
the hub)
The car has an approval for the complete vehicle
with certain combinations of wheel rims and
tyres.
Related information
•
Tyres (p. 448)
•
Size designation for tyre (p. 470)
Size designation for tyre
Designations for tyre dimension, load index and
speed rating.
The car has an approval for the complete vehicle
with certain combinations of wheel rims and
tyres.
Designation of dimensions
All tyres have a dimension designation, such as
235/60 R18 103 H.
235 Tyre width (mm)
60 Ratio between tyre wall height and tyre
width (%)
R Radial ply
18 Rim diameter in inches
103 Codes for the maximum permitted tyre
load, tyre load index (LI)
H Speed rating for maximum permitted
speed, speed rating (SS). (In this case
210 km/h.)
Load index
Each tyre has a certain capacity to carry a load, a
load index (LI). The car's weight determines the
load capacity required of the tyres. The lowest
permitted load index is specified in a load index
table.