tire pressure AUDI TT ROADSTER 2014 Owners Manual

Knee airbags . . . . . . . . . . . . . . . . . . . . . 124
Side airbags . . . . . . . . . . . . . . . . . . . . . 126
Child Safety . . . . . . . . . . . . . . . . . . . 130
Important things to know ......... .
Child safety seats ................ .
Instal ling a chi ld safety seat .. .. .. . .
Additional Information ........... .
Vehicle operation ............ .
Intelligent technology .. .. .. . .
Notice about data recorded by vehicle
control modules .............. ... .
Electronic Stabilization Control (ESC) .
Rear spoiler ................ ... . .
Braking ........................ .
E lect ro-me chan ical power assis t ... . .
D riving w ith your quattro ......... .
Energy management ............. .
Driving and environment .....
The first 1,000 miles (1,500 km) and
afterwards .............. .. .. .. . .
Avoid damaging the vehicle ........ .
Driving through water on roads ... . .
Catalytic converter ............... .
Shutting down vehicle ............ .
Operate your vehicle economically and
minimize pollution ............... . 130
135
138
141
142
142
142
142
144
145
146
1 47
147
1 5 0
150
151
151 151
152
15 2
Tra iler towing . . . . . . . . . . . . . . . . . . . . 154
Vehicle care . . . . . . . . . . . . . . . . . . . 155
Vehicle care and cleaning . . . . . 155
General information . . . . . . . . . . . . . . 155
Car washes . . . . . . . . . . . . . . . . . . . . . . 155
Cleaning and care information . . . . . . 156
Fuel supply and filling your
fuel tank . . . . . . . . . . . . . . . . . . . . . . .
16 1
Gasoline . . . . . . . . . . . . . . . . . . . . . . . . 161
Fuel tank. . . . . . . . . . . . . . . . . . . . . . . . 162
Checking and filling . . . . . . . . . . . 16 5
Engine hood . . . . . . . . . . . . . . . . . . . . . 165
Eng ine oil . . . . . . . . . . . . . . . . . . . . . . . 167
Eng ine cooling system............. 172
Brake fluid ...................... 174
Table of contents 3
Battery . . . . . . . . . . . . . . . . . . . . . . . . . 175
Windshield/headlight washer
container . . . . . . . . . . . . . . . . . . . . . . . 180
Tires and wheels ........... .. .
Tires ..... .. .... .. . .. .......... .
Tire pressure monitoring system ... .
Run-flat tire s .. .. ............... .
Do-it-yourself service ........ .
What do I do now? ........... .
Trunk escape handle ............. .
Vehicle tool kit .... .............. .
T ire repai r .... ... .. ............. .
What should I be aware of when
h . t
' 7 c angmg a ire .................. .
Fuses and bulbs .. .. .. ..... ... .
El ectr ical fuses . .. .. ............. .
Bulbs .......................... .
Emergency situations ........ .
General ........................ .
Starting by pushing or towing ...... .
Starting with jumper cables ....... .
U se of jump er cables ............. .
Emergency towing with commercia l
tow truck ...................... .
Lifting vehicle .. .. ............... . 181
181
199
202
205
205
205
205
206
209
213
213
216
217
217
217
217
218
219
222
Technical data
. . . . . . . . . . . . . . . . . 223
Technical Data . . . . . . . . . . . . . . . . . 223
Vehicle identification . . . . . . . . . . . . . . 223
Weights . . . . . . . . . . . . . . . . . . . . . . . . 223
Dimensions . . . . . . . . . . . . . . . . . . . . . . 224
Capacities . . . . . . . . . . . . . . . . . . . . . . . 224
Gasoline engines . . . . . . . . . . . . . . . . . 225
Consumer Information . . . . . . . 226
Warranty coverages . . . . . . . . . . . . . . . 226
Operating your vehicle outside the
U.S. A. or Canada . . . . . . . . . . . . . . . . . 226
Audi Service Repair Manuals and
Literature . . . . . . . . . . . . . . . . . . . . . . . 226
Maintenance. . . . . . . . . . . . . . . . . . . . . 226
Additional accessories, modifications
and parts rep lacement . . . . . . . . . . . . 228
•
•

Instrument s and warnin g/indic ator ligh ts 13
road, stop the engine, and turn on the
emergency flasher¢
page 51.
-The engine com partment of any motor
vehicle is a potentially hazardous area.
Before you check anything in the engine
compartment, stop the engine and let it
cool down. Always exercise extreme cau­
t ion when wor king under the hood
¢ page 165, Working in the engine
compartment
(D Tips
Ma lfunctions or faults w ill be identified e i­
ther with a red symbo l (pr iority 1 -Dan­
ge r!) o r with a ye llow symbol (pr iority 2 -
Warn ing).
Overview
Some ind icator lights turn on briefly to check
the function of that system when yo u switch
the ignition on. These systems are marked
with a./ in the following tab les. If one of
these ind icator lights does not turn on, there
is a malfunction in that system.
R ed indicator lights
Red symbols indicate a priority malfu nction -
Danger!
- P ull off the road.
- Stop t he vehicle.
- T urn off the engine .
- Check the ma lfunction ing system. Contact
you r authorized Aud i dealer o r a qualified
workshop for assistance .
-USA model s: Ma lfunction in the
brake system ¢
page 14
Canada model s: Ma lf u nction in the
brake system ¢
page 14
USA models: Airbag system ./
¢page 15
Canada model s: Airbag system ./
¢page 15
Safety belt
¢page 16
Battery./
¢page 16
Engine oil pressure too low
¢ page 16
Engine coolant level too low/
engine coolant temperature too
h igh
¢ page 17
Electro-mechanical power assis t
¢page 17
Clutch is overhea ting
¢page 87
Yellow indicator lights
Yellow symbo ls indicate a prior ity 2 malfunc­
t ion -Wa rning!
•
I
Convertib le top
¢ page 17
Electronic Stab ilizat ion Con tro l (ESC)
./ ¢page 18
Electronic St abiliz at ion Con tro l (ES C)
./ ¢page 18
~ USA models : anti- lock b rake system
liJ.:tl (A BS) ./ defec tive ¢ page 18
•
Canada models : anti-lock brake sys­
t em (ABS) ./ defect ive ¢
page 18
Worn b rake pads
¢ page 19
Tire pressure too low
¢ page 200
mfflT ire pressure monitoring system
WiU.t:.F page 200
~ Electronic power control./
1.1&:J ¢ page 19
USA models: Malfunction Indicator
Lamp (MIL)
¢page 19

.. Fasten your safety belt and wear it properly.
Also instruct your passengers to fasten their
safety belts properly ¢
page 101.
What impairs driving safety?
Safe driving is directly related to the condi­
tion of the vehicle, the driver as well as the
driver's ability to concentrate on the road
without being distracted.
The driver is responsible for the safety of the
veh icle and a ll of its occupants . If your ability
to drive is impaired, safety risks for everybody
in the vehicle increase and you also become a
hazard to everyone else on the road ¢
,&..
Therefore:
.,. Do not let yourself be distracted by passen­
gers or by us ing a cellular telephone.
.. NEVER drive when your driv ing ability is im ­
paired (by medicat ions, alcohol, drugs, etc.) .
.. Observe all traffic laws, ru les of the road
and speed limits and plain common sense.
.. ALWAYS adjust your speed to road, traffic
and weather conditions.
.. Take frequent breaks on long trips. Do not
drive for more than two hours at a stretch .
.. Do NOT drive when you are tired, under
pressure or when you are stressed.
A WARNING
Impaired driving safety increases the risk
of serious personal injury and death when­
ever a vehicle is being used.
Drivin g Sa fely 93
Proper occupant
seating positions
Proper seating position for the driver
The proper driver seating position is impor­
tant for safe, relaxed driving.
Fig. 101 The correct d istance between driver an d
steer ing wheel
For your own safety and to reduce the risk of
injury in the event of an accident, we recom­
mend that you adjust the driver's seat to the
f o ll ow ing pos ition:
.,. Adjust the driver's seat so that you can easi­
ly push the pedals all the way to the floo r
while keeping your knee(s) slightly bent
q&_ ,
.. Adjust the angle of the seatback so that it is
in an upright position so that your back
comes in full contact with it when you drive.
.. Adjust the steering wheel so that there is a
distance of at least 10 inches (25 cm) be­
tween the steering wheel and your breast
bone¢
fig. 101. If not possible, see your au­
thorized Audi dealership about adaptive
equ ipment .
.. Adjust the steering wheel so that the steer­
ing wheel and airbag cover points at your
chest and not at your face .
.. Grasp the top of the steering whee l with
your elbow(s) slightly bent .
.. Adjust the head restraint so the upper edge
is as even as possible with the top of your
head . If that is not poss ible, try to adjust
the head restraint so that it is as close to
this pos ition as possib le .
.. Fasten and wear safety belts correctly
qpage 104.

98 Driving Safely
• Distribute the load evenly in the luggage
compartment.
• Always place and properly secure heavy
items in the luggage compartment as far
forward as possible.
A WARNING
Improperly stored luggage or other items
can fly through the vehicle causing serious
personal injury in the event of hard brak­
ing or an accident. To help reduce the risk
of serious personal injury:
- Always put objects, for example, luggage
or other heavy items in the luggage com­
partment.
- Always secure objects in the luggage
compartment using the tie-down eyelets
and suitable straps.
A WARNING
Heavy loads will influence the way your ve­
hicle handles. To help reduce the risk of a
loss of control leading to serious personal
injury:
-Always keep in mind when transporting
heavy objects, that a change in the cen­
ter of gravity can also cause changes in
vehicle handling:
- Always distribute the load as evenly as
possible.
- Place heavy objects as far forward in
the luggage compartment as possible.
- Never exceed the Gross Axle Weight Rat­
ing or the Gross Vehicle Weight Rating
specified on the safety compliance stick­
er on the left door jamb. Exceeding per­
missible weight standards can cause the
vehicle to slide and handle differently.
- Please observe information on safe driv­
ing
!:? page 92 .
A WARNING
To help prevent poisonous exhaust gas
from being drawn into the vehicle, always
keep the rear lid closed while driving.
- Never transport objects larger than
-
those fitting completely into the luggage area because the rear lid cannot be fully
closed.
- If you absolutely must drive with the rear
lid open, observe the following notes to
reduce the risk of poisoning:
- Close all windows,
- Close the convertible top,
- Open all air outlets in the instrument
panel,
- Switch off the air recirculation,
- Set the fresh air fan to the highest
speed.
A WARNING
-Always make sure that the doors, all win-
dows, the convertible top and the rear lid
are securely closed and locked to reduce
the risk of injury when the vehicle is not
being used.
- After closing the rear lid, always make
sure that it is properly closed and locked.
- Never leave your vehicle unattended es­ pecially with the rear lid left open . A
child could crawl into the vehicle through
the luggage compartment and close the
rear lid becoming trapped and unable to
get out. Being trapped in a vehicle can
lead to serious personal injury.
- Never let children play in or around the
vehicle.
- Never let passengers ride in the luggage
compartment. Vehicle occupants must
always be properly restrained in one of
the vehicle's seating positions.
@ Tips
- Air circulation helps to reduce window
fogging. Stale air escapes to the outside
through vents in the trim panel , on the
left side of the luggage compartment.
Be sure to keep these slots free and
open.
- The tire pressure must correspond to the
load. The tire pressure is shown on the
tire pressure label. The tire pressure la­ bel is located on the driver's side B-pillar .
The tire pressure label lists the ..,

(D Note
Never push the vehicle or apply force to
the rear spoiler -it could be damaged.
@ Tips
Clean the spoiler compartment every 2 to
3 months . The spoiler compartment must
always be free of ice, snow, leaves or other
debris.
Braking
General information
What affects braking efficiency?
Oper ating condit ions and d riving hab it s
T he brakes on today's automobi les are st ill
s ubject to wear, depending largely on opera t­
ing conditions and dr iv ing habi ts
c> & . On
vehicles that are e ither driven mostly in stop ­
and-go city traffic or are d riven hard , the
b rake pads should be checked by you r author­
i zed Audi dealer more often than specified i n
the
Warr ant y & Maint enan ce booklet . Failure
to have your brake pads inspected can res ult
in red uced brake performance.
On steep slopes, you shou ld use the brak ing
effect of the eng ine. This way, you p revent un­
necessa ry wear on the brake system . If you
must use yo ur brakes, do not hold the brakes
down continuously. Pump th e brakes at inter­
vals.
Noises may occur when braking d epending on
the speed, braki ng force and outside condi­
tions such as temperature and humidity.
Moistu re or road salt
Unde r certain conditions, for example, w hen
driving through water or ve ry heavy rain, or
even after washing your vehicle, the braking
effect can be reduced d ue to moisture (or in
fre ezing conditions ice) on the brake pads . A
few ca utious brake applicat ions should dry off
the b rake pads or remove any ice coatings.
The effectiveness of the brakes can be reduced
when th e vehicle is driven on a salt-covered
Int ellig ent technolog y 145
road and the b rakes are no t used. Likewise ,
you clean off accumulated salt coating from brake d iscs and pads with a few cautious ap ­
plications of the brake
c> & .
Cor ro sion
T here may be a tendency for dir t to build up
on the brake pads and corrosion to form on
the discs if the car is not driven regu larly or
on ly fo r short trips with litt le use of the
brakes.
If the brakes are not used frequently, or if cor­
rosion has formed on the discs, it is advisable
to clean off the pads and discs by braking
firmly a few times from a moderately high
speed
c> & .
Faults in the brak e syst em
If you shou ld notice a sudden increase in
brake pedal trave l, then one of the two brake
c ircuits may have fai led
c> & .
Low brake fluid lev el
Malfunctions can occur in the brake system if
the b rake fluid level is too low. The brake fluid
level is monitored electronica lly.
Brake booster
T he brake booster inc reases the pressure that
you generate with the brake peda l. It works
o nl y when the engine is running
.c> &
Brake lining wear status
Brake lining wear may be checked by visual in­
spection of the condition of the brake pads
through the open ings in the wheel. If neces­
sary, the wheel may be removed for t his in­
spection
c> page 209, What should I be
aware of when changing a tire? .
A WARNING
--=
-You should perform braking maneuvers
for the purpose of cleaning the brake
system only if road conditions permit.
Other road users must not be put at risk -
you may cause an accident!
- Before descend ing a steep grade, reduce
speed and sh ift transmission into a lower
~
•
•

Vehicle care and clean ing
General information
Regular, proper care helps to maintain your
vehicle 's value. It can also be a requirement
when submitting warranty claims for corro ­
sion damage and paint defects on the body .
The required cleaning and care products can
be obtained from your authorized Audi dealer
or a qualified workshop . Read and follow the
instructions for use on the packaging.
A WARNING
-Us ing clean ing and care products incor­
rectly can be dangerous to your hea lth.
- Always store cleaning and care products
out of reach of children to reduce the risk
of poisoning.
@) For the sake of the environment
-Preferably use environmentally-friendly
products when buying cleaning agents.
- Do not d ispose of leftover cleaning and
care products with household trash .
Car washes
-
The longer that deposits such as insects, bird
droppings, tree sap or road salt remain on the
vehicle, the more the surface can be dam­ aged. High temperatures such as those
caused by sunlight increase the corrosive ef­
fect.
Before washing, wet heavy deposits w ith plen­
ty of water.
Also, wash the underside of your vehicle once road salt stops be ing used for the season.
Pressure washers
When washing your vehicles with a pressure
washer, always follow the operating instruc­
tions provided w ith the pressure washer . Th is
is especially important in regard to the pres ­
sure and spraying distance. Do not aim the
spray directly at seals on side w indows, doors,
Vehicle care and cleaning 155
the hood, the rear lid or the convertible top or
at tires, rubber hoses, insulating material
orsensors*. Keep a distance of at least 16 in­
ches (40 cm) .
Do not remove snow and ice with a pressure
washer.
Never use rotary nozzles or high pressure noz­
zles.
The water temperature must not be above
140 °F (60 °C) .
Automatic car washes
Spray off the vehicle before washing.
Make sure that the windows are closed and
the windshie ld wipers are off. Follow instruc­
tions from the car wash operator, especially if
there are accessories attached to your vehicle.
If possible, use car washes that do not have
brushes .
Washing by hand
Clean the veh icle starting from the top and
working down using a soft sponge or cleaning
brush. Use solvent-free cleaning products.
Washing vehicles with matte finish paint
by hand
To avoid damaging the paint when washing,
first remove dust and large particles from
your vehicle. Insects, grease spots and finger­
prints are best removed with a special cleaner
for matte finish paint .
Apply the product using a microfiber cloth. To
avoid damaging the paint surface, do not use
too much pressure .
Rinse the vehicle thoroughly with water. Then
clean using a neutral shampoo and a soft mi­
crofiber cloth.
Rinse the vehicle thoroughly again and let it
air dry . Remove any water residue using a
shammy.
Stubborn deposits such as bird droppings or
tree sap are best removed with p lenty of wa-
ter and a microfiber cloth. .,..
•
•

Tires and wheels
Tires
General notes
Tires may be the least appreciated and most
abused parts of a motor vehicle .
Tires may be the least appreciated and most
abused parts of a motor vehicle . Tires are,
however, one of the most important parts of a
vehicle, particularly considering the compara­
tively small patch of rubber on each tire that
assures that a ll- important contact between
you, your vehicle and the road.
Maintaining the correct tire pressure, mak ing
sure that your vehicle and its tires do not have
to carry more weight than they can safely han­
d le, avoiding damage from road hazards and
r eg ularly inspect ing t ires for damage i nclud­
ing cuts, slashes irregu la r wear and ove rall
condition are the most important things that
you can do to he lp avoid sudden tire failure in­
cluding tread separat ion and blowouts.
A vo idin g damage
If you have to drive over a curb or similar ob­
stacle, drive very slow ly and as close as possi ­
b le at a right angle to the curb.
A lways keep chemicals includ ing grease, o il ,
gasoline and brake fluid off the t ires .
I nspect the t ires regularly for damage (cuts,
cracks or b listers, etc.). Remove any fo reign
bod ies embedded in the treads.
Storing tires Mark tires when you remove them to indicate
the direction of rotation . Th is ensures you to
be ab le to mount them correctly when you re­
i nstall them .
When removed, the wheels or t ires should be
sto red in a cool, dry and preferably dark place .
Store tires in a vertical pos ition if they are not
mounted on rims, in a horizontal pos it ion if
they are mounted on rims .
Tires an d wheel s 181
New tires
New ti res have to be broken in¢& .
The tread depth of new t ires may vary, accord­
ing to the type a nd make of t ire and the tread
patte rn.
H idden damage
Damage to tires and r ims is often not readily
visible . If you notice unusual v ib rat ion or the
vehicle pulls to one s ide, th is may ind icate
that one of the t ires has been damaged . T he
ti res m ust be chec ked immed iate ly by an au­
thorized Audi dea le r or q ua lified wor kshop .
Unidirectional tires
A un idirectional tire can be identified by ar­
rows on the sidewa ll, that po int in the direc­
tion the t ire is designed to rotate. You must
f ol low the specified di rection of rotation . T his
is necessary so that these tires can develop
their optimum characteristics regarding grip, road noise, wear and hydrop laning resistance.
For more information
¢ page 212.
A WARNING
New tires or t ires that are o ld, worn or
damaged cannot provide maximum con­
trol and braking ability .
-
-New tires tend to be slippery and must
be broken in. To reduce the r isk of losing
control, a co llision and ser ious personal
in ju ries, d rive with special ca re for the
fi rst 350 m iles (560 km).
- Driving with worn or damaged tires can
lead to loss of control, sudden tire fail­
ure, including a blowout and sudden de­
fl ation, cras hes and se riou s personal in­
juries . Have worn or damaged t ires re­
placed immediate ly.
- Tires age even if they are not being used
and can fai l sudden ly, especially at hig h
speeds. Tires that are more than 6 years
old can only be used in an emergency
and then w ith special care and at low
speed.
•
•

182 Tire s and wheel s
-Never mount used tires on yo ur vehicle if
yo u are not sure of their "previous histo­
ry." Old used tires may have been dam­
aged even though the damage cannot be
seen that can lead to sudden t ire failure
and loss of vehicle control.
- If you notice unusual vibration or if the
vehicle pulls to one side when driving, al­
ways stop as soon as it is safe to do so
and check the wheels and tires for dam­
age.
(D Note
Please note that summer and wi nte r tires
are designed for the cond itions that are
Glossary of tire and loading terminology
Accessory weight
means t he comb ined we ight (in excess of
those sta ndard items which may be rep laced)
of au toma tic tra nsmission, power s teer ing,
power brakes, power windows, power seats,
ra dio, and heater, to the extent that th ese
items are availab le as factory -installed equip­
ment (whether installed or not) .
Aspect ratio
means t he ratio of the he ight to the w idth of
the tire in percent . Numbers of 55 or lower in ­
dicate a low sidewall for improve d steering re­
sponse and better overall handling on dry pavement .
Bead
means the part of the ti re that is made of
steel wires, wrapped or reinforced by ply cords
and that is shaped to fit the rim.
Bead separation
means a b reakdown of the bond between
components in the bead.
Cord
means the strands forming the plies in the
tire . typ
ica l in those seasons . Aud i recommends
using winter tires during the winter
months . Low temperatures signif icant ly
decrease the e lasticity of summer tires,
which affects tract ion a nd brak ing ability.
If summer tires are used in very co ld tem­
peratures, cracks ca n form on the tread
bars, res ulting in permanent tire damage
that can cause loud driving no ise and un­
balan ced t ires. Audi i s not responsible for
th is type of damage .
Cold tire inflation pressure
means the tire p ress ure recommended by t he
vehicle manufacture r fo r a tire of a des igna ted
s iz e t hat has not bee n driven for more than a
coup le of miles (k ilometers) at low speeds in
t h e three hour period before the tire pressure
is measured or adjusted.
Curb weight
mea ns the we ight of a motor ve hicle with
standard equipment in clu din g the max imum
capacity of fuel, oil, and coolant, air condi ­
tioning and additional weight of optiona l
equipment.
Extra load tire
me ans a tire designed to ope rate a t higher
loads and at highe r inflation p ress ures than
the corresponding standard tire. Extra load
tires my be identified as "XL", "xl", "EXTRA
LOAD", or "RF" on the sidewall.
Gross Axle Weight Rating ("GAWR ")
me ans the lo ad -c a rry ing c apac ity of a s ingle
axle system , measured a t the tire-ground in­
terfaces.
Gross Vehicle Weight Rating ("GVWR ")
mea ns the max imum total loaded we ight of
t h e ve hicl e. .,.

Groove
means the space between two adjacent tread
ribs.
Load rating (code)
means the maximum load that a tire is rated
to carry for a given inflation pressure. You
may not find this information on all tires be­
cause it is no t req uired by law.
Maximum load rating
means the load rating for a t ire at the max i­
mum permissible inflation pressure for that
tire.
Maximum loaded vehicle weight
means the sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight, and
(d) Production options weight
Maximum (permissible) inflation pressure
means the maximum cold inflation pressure
to which a tire may be inflated. Also called "maximum inflation pressure."
Normal occupant weight
means 150 lbs. (68 kilograms) times the
number of occupants seated in the vehicle up
to the total seating capacity of your vehicle.
Occupant distribution
means distribution of occupants in a vehicle.
Outer diameter
means the overa ll diamete r of an inflated new
tire.
Overall width
means the linear distance between the exteri­
ors of the sidewalls of an inflated tire, includ ­
in g elevations due to labeling, decorations, or
protective bands or ribs.
Ply
means a layer of rubber-coated parallel cords.
Tires and wheels 183
Production options weight
means the combined weight of those installed
regular production options we ighing 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 duty brakes, ride levelers, heavy duty
battery, and special trim.
Radial ply tire
means a pneumatic tire in wh ich the ply cords
that extend to the beads are laid at substan­
tia lly 90 degrees to the center line of the
tread .
Recommended inflation pressure
see ¢ page 182, Cold tire inflation pressure.
Reinforced tire
means a t ire designed to operate at higher
loads and at higher inflat ion pressures than
the corresponding standard tire . Reinforced
tires my be identified as "XL", "xl", "E XTRA
LOAD", or "RF" on the sidewall.
Rim
means a metal support for a tire or a tire and
tube assembly upon which the tire beads are
seated.
Rim diameter
means nom inal d iameter of the bead seat. If
you change your wheel s ize, you will have to
purchase new tires to match the new rim di­
ameter.
Rim size designation
means r im diameter and width .
Rim width
means nominal distance between rim flanges .
Sidewall
means that portion of a tire between the
tread and bead. •
•

184 Tires and wheels
Speed rating (letter code)
means the speed at wh ic h a tir e is des igned to
be d riven for extended per io d s o f time. The
ratings range from 93 mph (150 km/h) to
186 mph (298 km/h)
¢ page 193. You may
not find this in format ion on all tires because
it is not required by law.
The speed rating letter code, w here a pplica­
b le, is molded on the tire s idewa ll and indi­
cates the maxim um permissible road speeds
¢ &. in Winter tires on page 197.
Tire pressure monitoring system
means a sys tem that detects whe n one or
mo re of a vehicle's t ires a re under inflated and
il lum inates a low t ire p ress ure warn ing te ll­
tale.
Tread
means t hat port ion of a tire tha t comes into
con tact w it h t he road.
Tread separation
means pull ing away of the t read from the t ire
car cass .
Treadwear indicators (TWI)
means t he p rojections withi n the pr inc ipal
g rooves desig ned to give a v isua l ind ication of
the deg rees of wea r of the tre ad . See
¢
pag e 191, Tread W ear Indicator (TWI) for
mo re inf ormat io n on measu ring tire we ar.
Uniform Tire Quality Grading
is a ti re i nfo rmation system developed by the
United States Nat io nal Highway Traffic Safety
Admi nistration (N HTSA) that is designed to
h e lp buye rs m ake re lative compa risons among
tires. The UT QG i s n ot a safety r ating an d no t a
g ua ran tee t hat a tir e will las t fo r a presc ribed
n umber of m iles or per form i n a certa in way .
It sim ply g ives tire buyers a dditio na l info rma­
tion to combine w ith other considerations, s
u ch as pr ice, brand loyalty a nd dealer recom ­
me ndations. Under U TQG, tires are gra ded by
t h e tire man ufact urers in three areas : tread­
wear, traction and temperature resistance .
The UTQG informat io n on the tires, m olded in ­
to the sidewalls .
U.S. DOT Tire Identification Number (TIN )
This is the tire's "se ria l numbe r" It begins
with the letters "DOT" and ind icates that the
t ir e meets all federa l standards. The next two
numbers or letters ind icate the plant where it
was ma nufactu red, and the last four numbe rs
r eprese nt the week and year of ma nufact ure.
Fo r exampl e,
DOT ... 2213 ...
means that the tire was produced in t he 22nd
wee k of 2013. The ot her numbers are market­
ing codes that may or may not be used by the
t ire manufacturer . This information is used to
contact consumers i f a tire defect requires a
r ecall .
Vehicle capacity weight
means the rated cargo and luggage load p lus
150 lbs. (68 k ilograms) times the vehicle's to­
ta l seating capacity as listed on the label lo­
cated on the driver's side B-pilla r.
Vehicle maximum lo ad on the tire
means that load on an individua l tire that is
determined by distrib uting to eac h axle its
share of the maxim um loaded vehicle weight
and divid ing by two .
Vehicle normal load on the tire
means that load on an individua l t ir e that is
determined by distrib uting to eac h ax le its
share of the curb weight, accessory weight,
and normal occ upant weig ht (d istr ibuted in
accorda nce wit h tab le below¢
page 185)
and divid ing by two .