2012 AUDI R8 SPYDER tires

184 Tire s and wheel s
-Ne ver 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 tire failure
and loss of vehicle control.
Glossary of tire and loading terminology
Accessory weight means t he comb ined we ight (in excess of
those standard items which may be rep laced)
of R t ron ic, powe r stee ring, powe r brakes,
power w indows, power sea ts, r ad io, and hea t­
e r, to the extent that these i tems are available
as facto ry -in stalled equipment (whether in ­
stalled or not).
Aspect ratio
means t he ratio o f the he ight to the w idth of
the tire in percent. Numbers of 55 or lower in ­
d icate a low sidewall fo r improved s teer ing re ­
sponse and better overall handling on dry
pavement.
Bead
means t he part of the tire that is made o f
steel wires, wr apped o r reinforce d by p ly co rds
and that is shaped to fi t the r im.
Bead separation
means a b reakdown of the bond between
compo nents in the bead.
Cord means the strands forming the plies in the
tire.
Cold tire inflation pressure
means t he tire pressure recommended by the
ve hicle manufacturer for a tire of a designated
size that has not been dr iven for more than a
couple of miles (kilometers) at low speeds in
the three hour period before the tire pressure i s measu red or adjusted. -
If you notice un usual vibration or if the
veh icle pulls to one side when driv ing, a l­
ways stop as soon as it is safe to do so and check the wheels and tires for dam­
age.
Curb weight
means the we ight of a motor ve hicle w it h
standard equipment includ ing the max imum
capa city of fuel, o il, and coolant, a ir cond i­
ti on ing and additional weig ht o f option al
equipmen t.
Extra load tire
means a t ire designed to operate at higher
loads and at highe r inflat ion p ress ures tha n
the cor responding standard tire. Extr a load
t i r es my be i dent ified as "XL" , "xl", "E XTRA
LO AD", or "RF" on the sidewall.
Gross Axle Weight Rating ( "GAWR ")
means the load-carry ing capacity of a s ingle
axle system, measured at the tire-ground in­
te rfaces.
Gross Vehicle Weight Rating ( "GVWR ")
means the maximum tota l loaded we ight of
the vehicle.
Groove
means the space between two adjacent tread
ribs .
Load rat ing (code )
me ans the maximum load that a tire is rated
to carry fo r a given inflation press ure. Yo u
may not fi nd this information on all tires be­
ca use it is not required by law.
Maximum load rating
me ans the lo ad r ati ng fo r a tire a t the m axi­
mum perm issib le inf lation pressure for that
ti re .

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 pressu re."
Normal occupant weight
means 150 lbs. (68 k ilograms) 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 overall diameter of an inflated new
tire.
Overall width
means the linear distance between the exteri­
ors of the sidewalls of an inflated tire, includ­
ing e levations due to labeling, decorations, or
protective bands or ribs.
Ply
means a layer of rubber-coated para llel cords.
Production options weight
means the comb ined 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 duty brakes, r ide leve lers, roof rack,
heavy duty battery, and specia l trim .
Radial ply tire
means a pneumatic t ire in which the p ly cords
that extend to the beads are laid at substan­
tially 90 degrees to the centerline of the
tread.
Tires and wheels 185
Recommended inflation pressure
see~
page 184, 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
ti res my be ident ified as "XL" , "xl", " EXTRA
LOAD", or "RF" on the sidewall.
Rim
means a metal support for a tire or a t ire 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 w ill have to
purchase new tires to match the new r im di­
ameter.
Rim size designation
means r im diameter and width.
Rim width
means nom inal distance between rim fla nges.
Sidewall
means that portion of a tire between the
tread and bead.
Speed rating (letter code)
means the speed at which a tire is designed to
be driven for extended periods of time. The
ratings range from 93 mph (150 km/h) to
186 mph (298 km/h)
~pag e 194 . You may
not find this information on all tires because
it is not requ ired by law.
T he speed rating letter code, where applica­
ble, is molded on the tire sidewall and indi­
cates the maximum pe rmissib le road speeds
~ .&. in Winter tires on page 198.
Tire pressure monitoring system
means a system that detects when one or
more of a veh icle's tires are underinflated and
illuminates a low tire pressure warning tell­
tale.
•
•

186 Tires and wheels
Tread
means that portion of a tire that comes into
contact with the road.
Tread separation
means pull ing away of the tread from the tire
carcass .
Treadwear indicators (TWI)
means the projections within the principal
grooves designed to give a v isual ind ication of
the degrees of wear of the tread. See
~ page 192, Tread Wear Indicator (TWI) for
more informat ion on measuring tire wear.
Uniform Tire Quality Grading
is a tire information system developed by the
United States National Highway Traffic Safety
Administration (NH TSA) that is designed to
help buyers make relative comparisons among
tires. The UTQG is not a safety rating and not a
guarantee that a tir e will last fo r a prescribed
number of miles or perform in a certain way.
It simply gives tire buyers additional informa­
tion to combine w ith other considerations,
such as price, brand loyalty and dea ler 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
to the sidewalls .
U.S. DOT Tire Identification Number (TIN)
This is the tire's "serial number" It begins
with the letters "DOT" and indicates that the ti
re meets a ll 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 ...
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 capacity weight
means the rated cargo and luggage load plus
150 lbs. (68 kilograms) times the vehicle's to­
ta l seating capacity as listed on the label lo­
cated on the driver's side B-pillar.
Vehicle maximum load on the tire
means that load on an individua l tire that is
determined by distributing to each axle its
share of the maximum loaded vehicle weight
and dividing by two.
Vehicle normal load on the tire
means that load on an individua l tire that is
determined by distributing to eac h axle its
share of the curb weight, accessory weight,
and normal occupant weight (distributed in
accordance with tab le below ~
page 186)
and dividing by two.
Occupant loading and distribution for vehicle normal load fo r various designated seating
capacities
I Designated seating capacity, Vehicle normal load,
number of occupants number of occupants
2 2
Normally loaded vehicle,
occupant distribution
•
2 in front

Tires and wheels 187
Cold tire inflation pressure
Tire pressure affects the overall handling , performance and safety of a vehicle .
Fig . 1 48 Tir e pr essur e la b el: located on drive r's s ide B ·
p ill ar
Tire pressu re genera lly refers to the amount
of air in a t ire tha t it needs it to do its job and
safely carry the combined load of the entire
vehicle and its contents . Tire pressure is
measured in kilopasca ls (kPa), the i nterna­
tional measuring unit and in pounds pe r
square inc h (PSI). Tire pressure is based in
p ar t o n the vehicle's desig n an d load limit­
the greatest amount of weight that the vehi­
cle can carry safe ly and the ti re size . The prop ­
er tire pressure is freq uent ly referred to as the
"recommended cold tire inf lation pressure ."
Air in the tires expands when the tire heats up
because of interna l frict io n when it flexes in
use . The ti re p ressu re is higher when the tire
has warmed up than when it is "cold ." It is the
i nflat io n pressure i n a "cold" tire that counts.
Therefo re, you s ho ul d never let air ou t of a
warm tire to matc h "cold tire infla tion p res­
sure" recommendations . The tires wo uld then
be underinf lated a nd could fail suddenly.
M ain taining proper t ire press ure is one of the
most impor tan t thi ngs you c an do to he lp
avoid sudden tire failure. Underinfla ted tires
are a major cause of s udden tire failure . Keep­
ing tires at the r ight pressure is also impor­
tant for safe and responsive vehicle handling,
traction, b rak ing and load carrying .
Tire pres­
sures are particularly important wh en th e
vehicle is being driven at higher speeds , and
then especially when heavily loaded even
within the permi ssible load -carrying capaci­
ties approved for your vehi cle.
"' ..,
-~ --------------- ~ a ;l!; TIRE AND LOADING INFORMATION
• (SfATING CAPAOTY JOTAI. I }ROHT I :CUITTR I :R£AR I)
l'hl!o combned~c:loo:upain.sanoatg0,sbo&AdnM'fexeeC1 •"'.gcw -b.
COI.O TIRE PRESSURE
- KPa.- PSI
- KPa,- PSI
_ KPa,. PSI
Fig. 149 Tir e p ressure label
SEE OWNER'S
MANUA L FOR
ADDITTONAL
INFOl n
u
The recommended tire pressures for your Audi
depe nd on the ki nd of tires on your ve hicle
and t he number of passe ngers and/or amount
of luggage you w ill be t ransporting .
The t ire pressure label located on driver's side
B-pillar on your Audi lists the recommended
cold t ire inflation pressu res for the veh icle at
its maximum capac ity weight and ti res that
were on yo ur vehicle at the time it was manu­
factu red.
If you wish to improve comfort when operat­
i ng the vehicle at normal load (up to 2 occu ­
pants), yo u can adjust ti re pressu res to those
specified for normal vehicle load. Befo re ope r­
at ing the veh icle a t max imum load, you must
incr ease t he tire pressures to those spe cified
f or maximum vehi cle load
Q .& .
Bear in mind that the tire pressure mon itor ing
system ca n only moni to r the tire pressures
that are sto red. The sys tem does not recog­
nize the load condi tion of your veh icle.
See the illustration
9 fig. 148 fo r the lo cat io n
of the label o n driver's s ide B-pillar (color o f
the actu al la bel a nd exa ct lo cat ion on t he ve ­
hicle will vary s ligh tly) .
Note t hat the follow ing table is acc urate at
the time of going to press and is s ubject to
c h ange. In the event of d iscre pan cies, the t ire
pressure label on driver's si de B- pillar always
ta kes precede nce . ..,.

188 Tire s and wheel s
The table below lists the recommended cold
tire inflation pressures for the Audi model
covered by your Owner's Literature at the vehi- cle's capacity weight and the ti
re sizes instal­
led on the respective models as original
equipment, or as a factory option.
Engine
(dis­
place­
ment in Tire designation
Tire pressure front Tire pressure rear
normal load full load normal load full load condition condition condition condition
liter )
a -cylin­
der
4 .2
inder
5.2 235
/3 5 R1 9 9 1 V
XL
295 /30 R19 100V X L
305 /30 R1 9 10 2V X L
235 /35 R19 91 V X L
295 /30 R1 9 100V XL
305 /30 R19 102V X L
XL= reinfor ced
PSI
45
Because tec hnical changes may be made to
vehicle equ ipment dur ing the model yea r, al­
ways compare the tire size designation on the
tire pressure labe l on you r vehi cle w it h the
tires on your vehicle. Ma ke s ure that the ti re
size information on the veh icle label is the
same as the size of the tires on the vehicle.
This is especially important if the vehicle be­
longs to someone else or you bought the vehi­
cle with different rims/tires or you bought the
vehicle as a previously owned vehicle.
Remember, your safety and that of your pas­
sengers also depends on mak ing sure that
load limits are not exceeded. Vehicle load in­
cludes everybody and everything in and on the
vehicle . These load lim its are technically refer­
red to as the vehicle's G ross Vehicle We ight
Rati ng ("GVWR"). The G ross Ax le Weight Rat­
i ng ("GAWR") is the max imum load that can
be app lied at each o f the veh icle's two axles.
The G ross Vehicle Weight Rating and the
Gross Axle Weight Rating are listed on the
safety compliance stic ker labe l located either
on the driver's side B-pillar. The tire pressure
labe l on your Audi lists the maximum com­
b ined weight of all of the occupants and lug­
gage or other cargo that the veh icle can carry.
For the location of the tire pressure label
¢ fig. 148.
kPA PSI kPA PSI
310 45 310
41
41
kPA PSI
280 41
280 41
kPA
280
280
280
280
.&_ WARNING
Overloading a vehicle can cause loss o f ve­
h icle cont ro l, a crash o r other accident, se ­
r ious pe rsonal injury, and even death.
- Ca rrying more we igh t than your veh icle
was designed to car ry wi ll prevent the
vehicle from handling properly and in­
crease the risk of a loss of vehicle con­
trol.
- The brakes on a vehicle that has been
overloaded may not be able to stop the
veh icle w ith in a safe distance.
- Tires on a vehicle that has been over load­
ed can fail s uddenly caus ing loss of con­
trol and a crash.
.&_ WARNING
- Incorrect tire pressures and/or underin­
flation can lead to a serious or fatal acci­
dent.
- Inco rrect tire pressures and/or underin­
f lation cause increased tire wear and can
affect the handling of the vehicle.
- Inco rrect tire pressures and/or underin­
f lation can a lso lead to s udden t ire fail­
ure, including a blowout and sudden de­
fl ation, ca using loss of veh icle cont ro l.

Checking tire pressure
The correct tire pressure for the tires original­
ly installed on your vehicle is listed on the tire
pressure label located on driver's side 8-pil­ lar.
The recommended t ire pressures are on the
tire pressure label and in the table
r:=> page 187, Cold tire inflation pressure . T his
means that the pressure must be checked and
a d ju sted when the tire has not been driven for
mo re than a couple of mi les (kilometers) at
l ow speeds during the p revious three hours.
Air in the tires expands when the tire heats up
as a result of internal fr iction as it flexes in
use. The tire pressure is higher when the tire
h as warmed up than when it is "cold".
It is the inflation pressure in a "cold" tire that
counts. Therefore, you shou ld never let air out
of a warm tire to match "Cold tire inflation pressure" recommendations
c> page 187. The
tires would then be under infla ted and could
fa il suddenly.
The tire pressure label on yo ur Audi lists t he
recommended cold t ire inflat io n pressures for
the new, or igina l equipment tires that were
on your vehicle at the t ime it was manufac­
tured. For the location of the label
r=> page 187, fig. 148.
Most tires lose a ir natu rally over time. They
can also lose some a ir if you dr ive ove r a pot­
h ole o r hit a curb while pa rking.
It is usua lly
n ot poss ib le to see whe ther the radial t ires
used today a re underi nflated just by looking
at them.
Therefore, be sure to check tire pressures at
l east o nce a month and always before going
on a long trip. Make sure to take the number
of people and the amount of luggage into ac­
count when adjusting tire pressure for a trip -
even one that you would not consider to be
"long". See r:=>page 190, Tires and vehicle
load limits for more important information.
Always use an accurate tire pressure gauge
when check ing and adjusting inflation pres ­
sures . Check all of the t ires. If the pressure in
Tire s an d wheel s 189
any tire is too high when the tire is "cold", let
air out of the tire slowly with the edge of the
tire ga uge and keep checking the pressure un­
ti l yo u reach the pressure that is correct for
the load (passengers and luggage) and kind of
driv ing you plan to do .
If the pressure in any ti re is too low, note the
difference between the pressure in the cold
tire and the pressure you need and add the air
that you need to reach the correct pressure for
t h e ve hicle load (passenge rs and luggage) for
the tires on your vehicle as l isted on the on
you r vehicle and in this ma nual a nd the k ind
of d riving you plan to do.
Never ex ceed the max imum inflation pres­
sure listed on the tire sidewall for any rea­
s on.
Remember that the vehicle manufacturer, not
t h e tire manu factu rer, determines t he correct
ti re p ressu re fo r th e tires on your ve hicl e.
It is important to check the t ire pressure when
the tires are co ld .
- Read the required tire pressure from the t ire
pressure labe l located on drive r's side B-pil­
lar.
- T urn the va lve stem cap counter-clockw ise
to remove it from the tire va lve.
- Place the air pressure gauge on the valve.
- The tire pressures should o nly be checked
and ad justed when the tires are co ld . The
slightly raised pressures of warm tires must
not be reduced.
- Adj ust the tire pressure to the load you are
carrying.
- Reinstall the valve stem cap on the va lve.
When should I check the tire pr essu re?
T he co rrect ti re pressu re is especially impor­
t a nt a t high speeds. The pressure should
therefore be checked at least once a month
and always before starting a jo urney .
When should I adjust the tire pressures ?
Adjust the tire pressure to the load you a re
ca rrying. After chang ing a whee l
or replacing .,..
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190 Tire s and wheel s
wheels you have to adjust t he tire pressures
on all w heels .
A WARNING
Incorrec t tire pressures and/or underinfla ­
t ion can lea d sudden tire failure, loss of
contro l, collision, ser ious personal injury
or even death.
- When the warning symbo l
RI] appears in
the instrument cluster, stop and inspect
the tires .
- Incorrect tire pressure and/or underinfla­
t io n can cause increased t ire wear and
can affect the handling of the ve hicle and
stopp ing ability .
- Incorrect tire pressures and/or underin­ fla tion can also lead to sudden tire fa il­
ure, incl uding a blowo ut and sudden de­
fla tion, causing loss of vehicle control.
- T he d river is responsible for the cor rect
t ire pressures fo r all tires on the vehicle .
T he ap plic a b le p ress ure v alues are locat­
ed on a st ic ker on the drive r's side 8-pil­
lar.
- O nly when all t ires on the vehi cle ar e fi l­
led to the correct pressure, the tire pres ­
sure monitoring system can wor k co r­
rect ly .
- Th e use of incorrect tire pressure values
can lead to accidents or other damage.
Therefore it is essential that the driver
observe the specif ied tire pressure va lues
for the tires and the correct pressures for
the funct ion of the tire pressure mo nitor­
ing system .
- Always inflate tires to the recommended
and correct tire pressure befo re drivi ng
off .
- Driv ing with under inflated tires bend
more, lett ing them get too ho t res ulting
in t read separation, sudden t ire fail ure
and loss of control.
- Excess ive speed and/ove rloading can
cause heat bui ld-up, sudden t ire fa ilu re
and loss of control.
- If the t ire pressur e is too low or too high,
the ti res w ill wea r pre matu rely a nd the
vehicle will not h and le we ll. -
If the tire is not flat and you do not have
to change a wheel immediately, drive at
red uced speed to the nearest service sta­
tion to check the t ire pressure and add
air as req uired.
(D Note
Driving without valve stem caps can ca use
damage to the tire valves. To prevent this,
a lways make sure that factory installed
valve stem caps o n all whee ls are sec urely
mounted o n the valve.
@ For the sake of the environment
Underinflated tires w ill also increase the
fuel consum ptio n.
Tires and vehicle load limits
T he re a re lim its to the amount of load o r
weight tha t any veh icle a nd any tire can ca rry .
A vehi cle that is overloaded will no t handle
well and is mo re d iff icu lt to stop . Ove rloading
can not only lead to loss of vehicle control,
but can also damage important parts of the
vehicle and can lead to sudden tire fa ilure, in­
clud ing a b lowout and sudden deflation that
can cause the vehicle to cras h.
Your safety and that of your passengers also depends on making sure that load limits are
not exceeded. Vehicle load includes everybody
and everything in and on the veh icle . These
load lim its are technically referred to as the
vehicle 's
Gro ss Vehicle Weight Rating
("GVWR").
The "GVWR" includes the weight of the basic
vehicle, all facto ry installed accessor ies, a full
tank of fuel, o il, coolant and other fluids plus
max imum load . T he max imum load includes
t h e nu mbe r of p assenge rs t hat the vehicle is
i n tended to c arry ("seat ing c apac ity") wi th an
ass umed we ight of 150 lbs . (68 kg) for each
passenger at a designated seating position
and the total weight of any luggage in the ve -
hicle. ..,_

The Gross Axle Weight Rating ("GAWR") is
the maximum load that can be applied at each
of the vehicle's two axles.
The Gross Vehicle Weight Rating and the
Gross Axle Weight Rating are listed on the
safety compliance sticker labe l located on the
driver's side B-pi llar . Your Audi has 2 seating
positions in the front for total seat ing capac i­
ty of 2. Each seating posit ion has a safety belt
c::> page 101, Safety belts.
The fact that there is an upper limit to your
ve hicle's Gross Veh icle Weight Rating means
that the total weight of whatever is being car­
ried in the veh icle is limited . The more passen­
gers in the veh icle or passengers who a re
heavier than the standard weights assumed
mean that less weight can be carried as lug­
gage.
The t ire pressure label on your Audi also lists
the maximum combined we ight of all of the
occupants and luggage o r othe r cargo that
the vehicle can carry. For the location of the
la be l c::>page 187, fig. 148.
A WARNING
Overloading a vehicle can cause loss of ve­
hicle control, a crash or other accident, se­
r ious personal injury, and even death.
- Carrying more weight than yo ur vehicle
was designed to carry will prevent the
vehicle from handling properly and in­
crease the risk of the loss of veh icle con­
trol.
- The brakes on a veh icle that has been
overloaded may not be able to stop the
vehicle within a safe distance .
- Tires on a vehicle that has been overload­
ed can fail suddenly, includ ing a b lowout
and sudden deflation, causing loss of
control and a crash.
Determining correct load limit
Use the example below to cal­
culate the total weight of the
Tires and wheels 191
passengers and luggage or oth­
er things that you plan to trans­
port so that you can make sure
that your vehicle will not be
overloaded.
Steps for Determining
Correct Load Limit
1. Locate the statement "THE
COMBINED WEIGHT OF OC­
CUPANTS AND CARGO
SHOULD NEVER EXCEED XXX KG OR XXX LBS"on your vehi­
cle's placard (tire inflation
pressure label)
¢ page 187,
fig. 148.
2. Determine the combined weight of the driver and pas­
sengers that will be riding in
your vehicle.
3. Subtract the combined
weight of the driver and pas­
sengers from
"XXX" kilo­
grams or
"XXX" pounds
shown on the sticker
¢ page 187, fig. 148.
4. The resulting figure equals
the available amount of car­
go and luggage load capaci-
ty. For example, if the
"XXX"
amount equals 1400 lbs.
and there will be five 150
lbs. passengers in your vehi­
c le, the amount of available .,..
•
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