McLaren SUPER SERIES, Owner'S Handbook Manual

Page: 225 / 268

Maintaining Your McLaren
Wheels and Tyres
6.31
Tyre markings
1. Width of tyre in millimetres.
2. Tyre profile given as percentage of tyre
width.
3. Indicates that the tyre is radial ply.
4. Indicates the diameter of the wheel rim
in inches.
5. The numbers denote load index and the
letter indicates the speed rating. 91
indicates a weight of 615 kg (1,350 lbs)
and Y indicates speeds over 186 mph
(300 km/h).
6. Displays the maximum load which can
be carried by the tyre.
7. Treadwear grade number. The higher
the figure the longer a tyre will last.
8. The alpha character denotes resistance
to heat. An ‘A’ rated tyre offers most
heat resistance.
9. Information about the manufacture of
the tyre. Contains place and date of
manufacture.
Tyres
WARNING: The tyres must be
mounted according to the labelling
on the tyre wall. The word ‘OUTSIDE’
must be on the outer edge of the
tyre when it is fitted to the wheel or
the stability of the vehicle will be
adversely affected, especially at
high speeds.
Asymmetric tyres
Asymmetric tyres have a tread pattern that
is different from one side of the tread to the
other. This combination of tread offers
better grip in both wet and dry conditions.
The outer tread features a larger stiffer
tread pattern that aids with cornering
stability. The inner tread pattern aids
stability in wet conditions. A central groove
in the tyre aids straight line stability.
WARNING: Only tyres recommended
by McLaren are to be fitted to the
vehicle.
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