Audi TT 2012 Owner's Manual page 102

Occupant distribution in a nor-
mally loaded vehicle
2 in front
Tires and wheels 2(
means that load on an individual tire that is
determined by distributing to each axle its
share of the maximum loaded vehicle weight
and dividing by two.
means that the tire was produced in the 22nd
week of 2011. The other numbers are market-
ing codes that may or may not be used by the
tire manufacturer. This information is used to
contact consumers if a tire defect requires a
recall.
Vehicle normalload on the tire
means that load on anïndividual tire that is
determined by distributing to each axle its
share of the curb weight, accessory weight,
and normal occupant weight (distributed in
accordance with table below c:>page 201)
and dividing by two.
Vehicle maximum load on the tire
tire meets all federal standards. The next two
numbers or letters indicate the plant where it
was manufactured, and the last four numbers
represent the week and year of manufacture.
For example,
DOT ... 2211 ...
Vehicle capacity weight
means the rated cargo and luggage load plus
ISO lbs. (68 kilograms) times the vehicle's to-
tal seating capacity as listed on the label
10-
cated on the driver's side B-pillar.
Vehicle normalload, number
of occupants
2
Designated seating capacity,
number of occupants
4
This is the tire's "serial number" It
b~gins
with the letters "DOl" and indicates that the
Occupant loading and distribution for vehicle normalload for various designated seating
capacities
Uniform Tire Quality Grading
is a tire information system developed by the
United States National Highway Traffic Safety
Administration (NHTSA) that is designed to
help buyers make relative comparisons among
tires. The UTQG is not a safety rating and not a
guarantee that a tire willlast for a prescribed
number of miles or perform in a certain way.
lt sim ply gives tire buyers additional informa-
tion to combine with other considerations,
su ch as priee, brand loyalty and dealer recom-
mendations. Under UTQG, tires are graded by
the tire manufacturers in three areas: tread-
wear, traction and temperature resistance.
The UTQG information on the tires, molded in-
ta the sidewalls.
U.S. DOT Tire Identification Number (TIN)
Treadwear indicators (TWO
rneans the projections within the principal
grooves designed to give a visual indication of
the degrees ofwear ofthe tread. See
Qpage 207, Tread Wear Indicator (TWI) for
more information on measuring tire wear.
Tread separation
rneans pulling away of the tread from the tire
carcass.
Tread
rneans that portion of a tire that comes into
contact with the road.
Sidewall
means nominal distance between rim flanges.
means that portion of a tire between the
tread and bead.
Rim width
Recommended inflation pressure
see c:> page 199, Cold tire inflation pressure.
Rim size designation
means rim diameter and width.
Rim
Rim diameter
Reinforced tire
means a tire designed ta operate at higher
loads and at higher inflation pressures than
the corresponding standard tire. Reinforced
tires may be identified as "XL" , "xl", "EXTRA
LOAD", or "RF" on the sidewall.
means a metal support for a tire or a tire and
tube assembly upon which the tire beads are
seated.
means nominal diameter of the bead seat. If
you change your wheel size, you will have to
purchase new tires to match the new rim di-
ameter.
Speed rating (letter code)
'---
means the speed at which a'tire is designed ta
be driven for extended periods oftime. The
ratings range from 93 mph (ISO km/hl to
186 mph (298 km/hl
c:> page 210.
You may
not fi nd this information on all tires because
it is not required by law.
The speed rating letter code, where applica-
ble, is molded on the tire sidewall and indi-
ca tes the maximum permissible road speeds
c:>
ID.
in Win ter tires on page 213.
Tire pressure monitoring system
means a system that detects when one or
more of a vehicle's tires are underinflated and
illuminates a low tire pressure warning tell-
tale.
Maximum loaded vehicle weight
means the sum of:
-------------------------------------------
Normal occupant weight
means ISO lbs. (68 kilograms) times the
number of occupants seated in the vehicle up
ta the total seating capacity ofyour vehicle.
Overall width
Maximum (permissible) inflation pressure
means the maximum cold inflation pressure
ta which a tire may be inflated. Also called
"maximum inflation pressure."
means the linear distance between the exteri-
ors of the sidewalls of an inflated tire, includ-
ing elevations due ta labeling, decorations, or
protective bands or ribs.
means a layer of rubber-coated parallel cards.
means distribution of occupants in a vehicle.
Production options weight
means the combined weight of those installed
regular production options weighing over 5
lbs. (2.3 kg) in excess of those standard items
which they replace, not previously considered
in curb weight or accessory weight, including
heavy dutYbrakes, ride levelers, roof rack,
heavy dutYbattery, and special trim.
means the overall diameter of an inflated new
tire.
(a) Curb weight
(b) Accessory weight
(c) Vehicle ca pa city weight, and
(d) Production options weight
Outer diameter
Occupant distribution
Radial ply tire
Ply
means a pneu matie tire in which the ply cords
that extend to the beads are laid at substan-
tially 90 degrees to the centerline of the
tread.