brakes AUDI Q7 2011 Owner´s Manual

_________________________________________ I_ n_ t_ e_ ll_,igent technology ,__E~-
If an individual wheel begins to rotate too slowly in relation to vehicle
speed and tends to lock, the ABS automatically reduces brake pres­
sure to prevent that wheel from locking .
Thi s automatic adjustment process wi ll cause a
slight vibration of
the brake pedal and some noises to alert you that vehicle speed must
be adapted to existing road and traffic conditions.
_& WARNING
Although the ABS is very effective, always remember that braking
capability is limited by tire traction. Always adjust your driving
speed according to the road and traffic conditions. Do not let the
extra safety afforded by the ABS tempt you into taking extra risks.
The ABS cannot overcome the laws of physics .
(I) Tips
• If ABS is not funct ioning properly, a warning light will come on .
See ~
page 19.
• If a fault occurs in the ABS, the EDL is also not functioning. This is
ind icat ed by the ABS warning light. •
Brake assistant
The brake assistant is designed to achieve the optimum
braking effect.
The brake assistant helps to increase the effective braking power and
thus to achieve a shorter stopping distance.
If the driver presses the
brake peda l very qu ickly , the brake assistant automatically boosts the
braking force to the maximum level, up to the point where the anti­
lock brake function (ABS) intervenes to stop the whee ls from locking.
You should then keep the brake pedal pressed until the vehicle has
braked to the required speed. The brake assistant switches itself off
as soon as you release the brake pedal.
Controls and equip­ ment Safety first Vehicle operation
Automatic full braking
assist
This function allows full braking in spite of high brake pedal forces
(e .g . when the brakes are severely stressed because the veh icle is fully
loaded). The driver notices this function through a reduction of pedal
force and increased pedal travel. When the brake pedal is released,
full braking assist switches off again automatically.
If there is an ABS failure, the brak e assistant and automatic full
braking assist are not available.
Th e brake assistant will not be operative if there is a ma lfunction in
the ABS .
_& WARNING
Please remember that the accident risk always increases if you
drive too fast, especially in corners or on a slippery road, or if you
follow the vehicle ahead of you too closely. Increased risk of an
accident cannot be compensated for even by the brake assistant ,
so always maintain a safe speed.•
Servotronic® -advanced power
steering system
The power steering systems uses the power of the
running engine to allow precise steering with little effort.
The advanced Servotronic ® power steering system senses the road
speed and electronically adjusts power assistance to provide
comfortable and safe steering response exactly matched to the
vehicle speed .
Power steering will not work if the engine is off. As a result , the
steering wheel will be hard to turn .
Th e power steering fluid level is checked during the scheduled main­
tenance services.
Vehicle care Do-it-yourself service Technical data

• Driving and environment
------------------------------------------------'
ffi For the sake of the environment
Even when the Emission Control System is operating properly, the
exhaust gas can have a sulfur-like exhaust gas smell under some
operat ing states. This depends on the sulfur content of the fue l being
used. Using a different brand of fuel may help, or filling the tank with
lead-free supe r grade gasoline. •
Applies to vehicles: with d iesel engine
Diesel particulate filter
The diesel particulate filter filters nearly all of the soot particles out
of the exhaust. The filter cleans itself automatica lly under norma l
driving conditions. If the filter cannot clean itself (for example,
because you are only driving short distances), the fi lter becomes
clogged with soot and the symbol for the diesel particulate filter
illuminates ~
page 40.
& WARNING
• Do not park your vehicle over flammable materials such as
grass or leaves because the high temperature of the diesel partic­
ulate filter could start a fire.
• Do not apply an underbody protectant in the exhaust system
area or a fire could start. •
Avoid damaging the vehicle
When you are driving on poor roads, or over curbs, steep ramps, etc.,
make certain that low-lying parts such as spoilers and exhaust system
parts do not bottom out and get damaged.
Thi s is espec ially true for vehicles with low-slung chassis (sports
chassis)" and fully loaded vehicles. •
Controls and equip­
ment Safety first Vehicle operation
Operate your vehicle economically
and minimize pollution
General
Your personal
style of driving will determine the economy
of your vehicle, as well as exhaust and noise levels.
Fuel economy, environmental impact, and wear on your engine,
brakes and tires largely depend on three factors:
• your personal dr iv ing style
• operating conditions
• technical limitations
If you anticipate what you need to do next and drive economically,
you can easily cut your fuel consumption by 10-15 percent. This
section will give you some tips on how you can he lp the environment
and your pocketbook.
(I) Tips
The consumption est imates as published by ENVIRONMENTAL
PROTECTION AGENCY (EPA) and Transport Canada may not corre­
spond to your actual consumption on the road, which will vary
depending upon vehicle load and speed, road and weather conditions,
trip length, etc.
Drive smoothly and keep a lookout ahead
Vehicles use the most fuel when they are accelerating.
-Avoid unnecessary accelerating and braking.
Vehicles use the most fuel when they are accelerating . If you antici­
pate what is going to happen next, you will need to brake less and,
thus, accelerate less. Let the vehicle coast whenever possible - for
example when you see that the next traffic light is red. •
Vehicle care Do-it-yourself service Technical data

Driving off road
- Use the hill descent control~ page 257 when dr iving
down steep sections on hills .
Unpaved roads and offroad
Drive slowly on unfamiliar roads and unknown offroad sections, and
loo k ou t for unexpec ted obsta cles (e.g. potho les, rocks, t ree st umps,
etc.).
T o prevent the vehicle from bottoming and avoid damage to the
unde rbody, you should d rive st raight ac ross severe b umps in the
ground with on ly one s ide of the vehicle so that on ly two of your
w heels cross the bumps.
Drive brisk ly throug h sandy or marshy offroad sections and do not
stop, if at all possible.
Driv ing th rough water
N ote the following to avoid vehicle dam age when driving throug h
water, for example on flooded roads:
• T he wate r must not be any higher than the bottom of the ve hicle
body .
• Do not drive faste r th an wal king speed .
Driving on a slope
If yo u ever find you rsel f not able to climb a slope, do not t ry to turn
around, drive back down in
re verse . Otherw ise, you run t he risk of
t ipping over .
If the vehicle threatens to t ip over when driving across a slope, you
must immediately steer downhill in the direction of the slope.
Do not park yo ur vehicle o n steep s lopes o r gr ad es.
To red uce the risk of tipp ing over, drive on s lopes in the di rect io n of
t he downward slo pe (fa ll line) -
not crosswi se .
Driv ing on snow-covered ground
T he s tandard tires fi tted to yo ur vehi cle are not snow t ires. So yo u
should mount wheels with snow t ires in good t ime where winter road
conditions p revail. Befo re dr iv ing on unp lowed stretches o f deep snow, install tire chains
. For tech nica l reasons, t ire chains may only
be ins talle d on the re a r wheels -never on the front whee ls.
& WARNING
After driving through water , mud, slush, etc. , the brakes may be
slow to take effect because of wet brake rotors and pads.
Dry the
brake s first by braking carefully to re store the full braking effe ct.
0 Note
Vehicle components such as the engine, trans mission, s uspension or
electrical system can be severely damaged by dr iv ing through water.
(I) Tips
• Check the dept h of the water before dr iv in g through it.
• Do not stop the vehicle, dr ive in reverse or sw itch the e ngine off
when driving through water.
• K eep in m ind th at on coming vehicles m ay cre ate w aves t hat ra ise
the water level and make it too deep for your vehicle to drive through
safe ly.
• Avoid dr iving through sa lt water because it ca n cause corrosion .•

Trailer towing
Driving with a trailer
General information Your Audi was design ed primarily for passenger transpor ­
tation .
If you plan to tow a t rai ler, p lease rem emb er that the add itiona l load
wi ll affect durab ility, economy and performance.
T railer tow ing not on ly p laces mo re s tress on the vehicle, it a lso calls
for more concentrat ion from the driver.
For this reason, a lways follow the ope rating and dr iv ing instr uctions
prov ided and use common sense .
(D Note
If you are going to tow a t ra iler , you must ac tivate the tra ile r ope ra­
tion mode ::::;,
page 182, "Towing a trailer". •
Technical requirements
Trailer hitch
Use a we igh t-car rying hit ch confo rm ing to the g ross tra ile r weig ht.
The hitch must be suitable for your vehicle and tra iler and must be
mou nted secure ly o n th e veh icle's chassis a t a
te chnically sound loca­
tion. Use only a trailer hitch with a removab le ba ll mount. Always
check w ith the tra iler h itch manufacturer to ma ke sure tha t you are
using the correct hitch .
Do not use a bumper hitch .
The hitch must be i nstalled in such a way t hat i t does not interfe re
w ith the impact-absorbing bumper system. No mod ificat ions should
Controls and equip­
ment Safety first Vehicle operation
be made to the vehicle exhaust and b
rake systems. From time to
time, check that all hitc h mounting bo lts rema in securely fastened.
Whe n you are no t towing a trai ler, remove the trailer hi tch ba ll
mount. This prevents the hitch from caus ing damage should your
vehicle be s truck from behind::::;,& .
Trailer brakes
If your trailer i s eq uipped w ith a b raking system, che ck to be s ure that
it conforms to all regulat ions.
T he tra iler hyd raulic brake system must not be directly connected to
the vehi cle's hydraul ic brake system ::::;, & .
Safety chains
Always use safety chains betwee n your vehicle and t he tra iler .
Trailer lights
Trailer lights must meet all regulat ions. Be sure to check w ith your
au thor ized A udi deale r for co rrect wi ring, switc hes, and re lays.
Mirrors
If you are unab le to see the traff ic beh ind you us ing t he regular
outside m irro rs, then you
must install extended mirro rs. It is impor­
t an t th at yo u
always have cle ar vision to the re a r.
& WARNING
• If a trailer has electrical brakes please note that these brakes
are not activated by the factory-fitted control unit -ri sk of acci ·
dent!
• Afte r removing the trailer hitch, do not store it in your vehicle .
In case of sudden braking, the hitch could fly forward and injure
you or your passengers .
Vehicle care Do-it-yourself service Technical data

pressure label is located o n the dr iver's side B-pillar. Inflate trailer
t ires to tra ile r and t ire ma nufacturers' spec ifications.
Lights
T he headl ight settings shou ld be chec ked with the tr ailer attached
before driving off. Check to make sure both vehicle and trailer lights
are wo rking properly.
Safety chains
Be sure tra ile r safety cha ins are p roperly connected from the t rai ler
to the hitch on the vehicle. Leave enough slack in the chains to perm it
tu rning corners . When you install sa fe ty ch ains, ma ke sure they will
not drag on the road when you are driving.
T he chains should cross under the trai ler tongue to prevent it from
dropping in case of separation from the h itch .
0 Note
If you are goi ng to tow a trai ler , you must activate the trai ler opera­
tion mode =>
page 182, "Towing a trailer". •
Driving instructior,s
Driving with a trailer always requires e xtra care and
consideration.
To obtain the best possib le handling of ve hicle a nd trailer ,
please note the following :
- Do not tow a loaded trailer when your car itself is not
loaded.
- Be especia lly careful when pass ing other vehicles .
- Observe speed limi ts.
- Do not drive at the maximum pe rmissible speed.
Controls and equip­
ment Safety first Vehicle operation
- Always apply brakes early.
- Mo
nitor the temperature gauge.
Weight distri but ion
T owing a loaded trailer with an empty car results in a highly unstable
distribution of we ight . If t his cannot be avoided , drive at very low
speeds only to avoid the risk of losing steering control.
A "balanced" rig is easier to operate and control. This means that the
tow veh icle shou ld be loaded to the extent poss ible and permissib le,
wh ile keeping the tra ile r as lig ht as poss ible unde r the ci rc u mstances.
Whe never possible, transfer some cargo to the luggage compart ­
me nt o f the tow vehicle while observing tongue load requirements
and vehicle loading considerations.
Speed
The higher the speed, the more d ifficult it becomes for the driver to
control the r ig . Do not dr ive at the maxim um permiss ible speed .
Reduce your speed eve n more if load, weather or w ind conditions are
unfavorable -particular ly when going downhill.
Reduce vehicle speed
immed iately if the tra ile r shows the slightest
sign of swaying.
Do not tr y to stop the s wayi ng by a ccele rating .
Observe speed lim its. In some areas, speeds for veh icles towing
trailers are lowe r than for regular veh icles .
Always apply brakes early. When driving downhi ll, shift into a lower
gear to use the engine brak ing effect to slow t he ve hicle . Use of the
brakes alone can cause them to overheat and fa il.
Coolant temperatur e
The coo lant temperature gauge=> page 10 must be observed care­
fu lly. If the needle moves close to the upper end of the sca le, reduce
speed immediately and/or turn off the air conditioner.
If the coo lant temperature warning light in the instrument clus ter
starts flash ing
- F- , pull off the road, stop and let the engine idle for
about two m inutes to prevent hea t buil d-up.
Vehicle care Do-it-yourself service Technical data

Trailer towing
"---------------------------------------------------
in. WARNING
Anyone not properly restrained in a moving vehicle is at a much
greater risk in an a ccident . Never let an yone ride in y our car who i s
not prop erly wearing the re straints provided by Audi. •
Trailer towing tips
Important to know
Your vehicle handles differe ntly when tow ing a tra iler because of the
additiona l weight and different we ight distribution. Safety, perfor­
man ce and economy w ill greatly depend on how ca refu lly yo u load
your trailer and operate your rig.
Be fore you actua lly tow your tra ile r, prac tice turning, stopp ing and
back ing u p in a n area away from traffic. Keep pract ic in g until you have
become completely familiar with the way your vehicle -trailer combi­
nation behaves and responds .
Backing up is diff icult and requ ires pract ice. Backing up w ith a trailer
gene rally requires s teer ing a ction opposi te to th at when ba cki ng up
your vehicle witho ut a trailer.
Maintain a greate r d istance between your ve hicl e and the one in front
of yo u. You will need more room to stop . T o compensate fo r the
trai ler, you will need a larger than normal turning radius .
W hen p assing, remember that you c annot acceler ate as fast as yo u
normally wou ld because of the added load. Make sure yo u have
enoug h room to pass. After passi ng, allow plen ty of room fo r yo ur
tra iler before changing lanes again .
Avoid jerky starts, sharp turns or rapid lane changes .
[ i ] Tips
• Do not tow a trai ler d uring the brea k-in perio d of your vehicle. •
If you tow a tra iler, your Aud i may require more frequent mai nte­
n an ce due to the ex tra load:::::>
page 368. •
Parking on a slope
Do not park on a slope with a trailer. If it cannot be
av oided, do so only after doing the following:
When parking:
- Apply the foot brak e.
- Have someone p lac e chocks un der bo th the vehicle and t he
traile r w he els .
- With c hoc ks i n place, slowly release the brakes u ntil the
wheel c hoc ks absorb t he load.
- Turn the w hee ls towards t he curb .
- A pply the parking brake.
- M ove th e selector le v er to
P.
When restarting after parking:
- A pply the foot brake .
- Start the engine .
- Mov e th e s elector lever to
D .
- Release the par king brake a nd s low ly pull o ut and away
fro m the w heel chocks.
- Stop a nd have someone retr ieve the w heel chocks .
(I) Tips
If you move the se lector lever of the a utomat ic t ransmiss ion to P
befo re applying t he par king br ake an d befo re blo cking the w heels, II-

-~_C_ le_ a_n_ i_ n_ g=- a_ n_d___. p_ ro_ t_e _c_ t_ i_o _n ___________________________________________ _
Cleaning and protection
General information
Regular care preserves vehicl e val ue.
Any automobile is exposed to industria l fumes, co rrosive road salt,
e tc. A well ca red for Audi c an look lik e new many ye ars after pur cha se.
Regu lar and correct care w ill contribute to mai nta in ing t he bea uty
a nd valu e of your Au di.
Furthermore, good care may be a condition for substantiating a
warranty claim should corrosion damage or paint defects occur.
Yo ur au thori zed Audi d eale r h as a var iety of dedicated vehicle-care
products
and can advise w hich ones to use for clea ning the exterior
a n d inter io r of your ve hicle.
W het her you use products recommended by Aud i or other comme r­
cia lly availab le cleaning agents , please make sure yo u appl y them
co rrectly .
& WARNING
• Cleaning agents may be poisonous . Keep them out of the reach
of children.
• Heed all caution labels .
• Always read directions on the container before using any
product. Follow the directions carefully.
• Most chemical cleaners are concentrated and have to be
diluted .
• Use spot removing fluids only in well ventilated areas.
• Do not use gasoline, kero sene , diesel fuel , nail polish remover
or other volatile fluids . They may be toxic, flammable or
hazardous in other ways. Do not wash, wax or dry the vehicle with
the ign ition on or the engine running .
& WARNING (continued )
• Do not clean the under sides of chassi s, fenders , wheel covers,
etc. without protecting your hands and arms. You may cut your­
self on sharp-edged metal parts.
• Moisture and ice on brakes may impair braking efficiency
~ page 259, "General information ". Test the brakes carefully
each time you wash the vehicle .
'£> For the sake of the environment
Select only envir onmenta lly fr iendly clea ning produc ts . Leftover
cleaning pro ducts sho uld not dis posed of i n the household waste .•
Care of exterior
Washing
F re quent w ashin g protec ts th e vehicle.
T he best protection aga inst env ironmental influences is frequent
w ashi ng and w ax ing. How oft en thi s is requ ired depen ds on :
• How m uch the vehicle is used
• Whe re the ve hicle is parke d (gar age, in the o pen un der tr ees, etc.)
• The seasona l and weather conditions
• Environ mental influences
T he longer bird droppings , insects , tree resin, road and industria l
gr ime, t ar, soo t, road sa lt and o ther ma ter ia ls remain on t he veh icle
body, the more lasti ng their destructive effects w ill be. H igh temper­
atu res cause d by ex pos ure to intense s unlight int ensify the co rrosive
effect, part icu larly when humid ity is high as we ll.
~

-Cleaning and protection
-----=---=----------------------------------------
(I] Tips
Keep silicone sprays off the windshield to avo id wipe r smear in ra in. •
Cast (light) alloy wheels
Cast (light) alloy wheels require special care.
- Wash the whee ls with a sponge or hose brush every o ther
wee k.
- For deep cleaning afterwards, use on ly a ded icated
acid­
free cast a lloy wheel c leaner .
- Rub a coat of
liquid wax onto the rim s every three m onth .
B e su re to re ach an d treat all part s o f the rim .
To preserve th e decorat ive ap pea rance of the cast a lloy whee ls, some
special care is necessary. In a ddition to road dirt and sa lt, brake dust
is a lso co rro sive . If left o n fo r to o long, brake dust ca n ca use pi tting.
Use only spec ial
acid -free clea ners formulated fo r a lloy r ims . Safe
pro duct s are available at your author iz ed Audi de aler. Neve r leave the
cleaner on t he rims longer than spec ified on t he label. If not rinsed
off promptly , the acid conta ined in some cleaners can attack t he
t hreads on the wheel bolts .
N ever use abrasive or metal po lish ing cleaning agents.
If the protec ­
t ive c oating ha s b een ch ipped, e.g. by k icked up ro ad dir t, touch it up
as soon as possible.
& WARNING
• Moisture and ice on brakes may affect braking efficiency
=> page 259, "General information ". Test the brakes carefully
each time you wash the vehicle.
• Always read and heed all WARNINGS and other information
=>page 278 . •
Body cavity sealing
Th e body c avity s ealing do es no t n eed to b e chec ked.
All body cavit ies which co uld be affected by cor rosion have been tho r­
ough ly pr ote ct ed at th e f actor y.
Thi s sea ling does no t req uire any in spect ion or addit ional t reat men t.
If any wax sho uld seep out of the cavity when t he ambient tempera ­
ture is high , it can be re m ov ed with a plastic sc rap er and a sui table
solvent.
& WARNING
Solvents can be dangerous.
• Benzine is flammable and toxic. If you use benzine for
removing the wax , keep sparks , flame and lighted cigarettes
away. Never dump benzine on the ground, into open streams or
down sewage drains.
• Be sure to observe all safety and environmental regulations.
Follow all instructions on the container.
• Always read and heed all WARNINGS and other informat ion
:=> page 278 . •
Chassis
H av e t he und erc oat ing ch ecke d for damag e from tim e to
tim e.
Th e lower body sh ell of yo ur A udi is a lso thoro ughly prot ected against
corrosion.
Any d am age to th e u ndercoat ing cau sed by ro ad haz ards sho uld be
repaired promptly.
& WARNING
Too much undercoat ing in the wrong places can cause a fire .

Ill Checking and filling
---=-----=----------------
warning/ind icator light will illum inate . Contac t an authorized Aud i
de aler
immediately .
[ i ] Tips
T he b rake fl uid reservoir is located unde rneath t he cover. •
Changing brake fluid
Have the b rake fluid chan ged by an exp eri enc ed t echni ­
cian.
B ra ke flui d absorbs mois ture fro m th e air . If the w ater con ten t in the
brake fl uid is too high, corros io n in th e brake system may result afte r
a p eriod of time. The boil ing po int of the br ake fl uid will also de cre as e
cons iderab ly and decr ease brak ing performa nce.
Th erefo re, the brake fl uid m ust be changed
every two years. Always
use new br ake fluid w hich conforms to Federal Motor Veh icle Stan­
dard "FMVSS 1 16 DOT
4" .
The b rake fl uid reservo ir can be diffi cult to rea ch, there fore, we
recommend that you have the brake fluid c hanged by your author ized
Audi dealer. Your dea ler has the correct tools, the rig ht b rake f luid
and the k now-how to do t his for you .
& WARNING
• Brake fluid is poisonous. It must be stored only in the closed
original container out of the rea ch of children!
• Brake failure can result from old or inappropriate brake fluid.
Observe these precautions:
-Use only brake fluid that meets SAE specification
J 1703 and
conforms to Federal Motor Vehicle Standard 116. Alway s check
with your authorized Audi dealer to make sure you are using
the correct brake fluid. The correct type of brake fluid is also indicated on the brake fluid reservoir .
& WARNING (co ntinued )
-The brake fluid must be new. Heavy use of the brakes can
cause a vapor lock if the brake fluid is left in the system too
long . This can seriously affect the efficiency of the brakes as
well as your safety . This could result in an accident.
0 Note
B rak e fluid will dam age the pai nt of yo u r ve hicl e.
<£> For the sake of the environment
Beca u se of the pr oblem of pro per dispo sal o f b rak e fl uid as we ll a s
the spec ia l too ls req uired and the necessary expertise, we recom ­
me nd that you h ave t he brake f luid chan ged b y yo ur a uth oriz e d Audi
dea ler. •
Battery
General information
Under normal operat ing co ndit io ns, the battery in your Aud i does not
need any maintenance. With high outs ide temperatures or long daily
dr iv es we re comme nd that yo u have th e ele ct rolyte level checked by
an a uth orized Audi dealer o r qualified wor kshop. The electro lyte leve l
s ho uld a ls o be che cked e ach time the batte ry is ch arge d=>
page 315.
Have the batte ry chec ked when yo u take yo ur vehicle in for serv ice.
Yo u ar e well advised to rep lace a batte ry that is older th an 5 years .
W ith certa in types of airbag deployme nt, the ba ttery is disconnected
from the vehicle e lectrica l system for safety reasons=>
& in "Repair,
c are and dis posa l o f the air bag s" on
page 225. ~

-~_T_ i_ re _ s_ a_n _ d_ w_ h _e_ e_ ls _________________________________________________ _
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 infla­
tion pressure. You may not find this information on all tires because
it is not required by law.
Maximum load rating
means the load rating fo r a tir e at the maximum 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 distr ibution of occupants in a vehicle .
Outer diameter
means the overall diameter of an inflated new tire.
Overall width
means the linear distance between the exteriors of the sidewalls of
an inflated tire, including elevations due to labeling, decorations, or
protective bands or ribs.
Ply
means a layer of rubber -coated paralle l cords.
Production options weight
means the combined weight of those installed regular production
options weigh ing 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, roof
rack, heavy duty battery, and special trim.
Radial ply tire
means a pneumatic tire in which the ply cords that extend to the
beads are laid at substantially 90 degrees to the centerline of the
tread .
Recommended inflation pressure
see=> page 319, "Cold tire inflation pressure".
Reinforced tire
means a tire design to operate at higher loads and at higher inflation
pressures than the corresponding standard tire. Reinforced t ires may
be identified as "XL ", "x l", "EXTRA LOAD", or "RF" on the sidewall.
Rim
means a metal support for a tire or a tire and tube assembly upon
wh ich the tire beads are seated .
Rim diameter
means nominal diameter of the bead seat . If you change your wheel
size, you w ill have to purchase new tires to match the new rim diam­
eter .
Rim size designation
means rim diameter and width.
Rim width
means nom inal distance between rim flanges.