2020 VOLVO S90 TWIN ENGINE tire type

WHEELS AND TIRES
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523
Tread wear indicatorThe tread wear indicator shows the status of the tire's tread.
The tread wear indicator is a narrow elevated strip running across the tire's longitudinaltread grooves. The letters TWI (Tread WearIndicator) are visible on the side of the tire.When approximately 1.6 mm (1/16 inch) is lefton the tread, the tread will be at the sameheight as the tread wear indicator. Replace thetire as soon as possible. Tires with low treadoffer very poor traction in rain or snow.
Related information
Tires (p. 520)
Tire terminology
The following is a glossary of tire-related terms.
The tire suppliers may have additional mark- ings, notes or warnings such as standard load,radial tubeless, etc.
Tire information placard
: A placard
showing the OE (Original Equipment) tiresizes, recommended inflation pressure,and the maximum weight the vehicle cancarry.
Tire Identification Number (TIN)
: A num-
ber on the sidewall of each tire providinginformation about the tire brand and man-ufacturing plant, tire size and date of man-ufacture.
Inflation pressure
: A measure of the
amount of air in a tire.
Standard load
: A class of P-metric or
Metric tires designed to carry a maximumload at 35 psi [37 psi (2.5 bar) for Metrictires]. Increasing the inflation pressurebeyond this pressure will not increase thetires load carrying capability.
Extra load
: A class of P-metric or Metric
tires designed to carry a heavier maximumload at 41 psi [43 psi (2.9 bar) for Metrictires]. Increasing the inflation pressurebeyond this pressure will not increase thetire's load carrying capability.
kPa
: Kilopascal, a metric unit of air pres-
sure.
PSI
: Pounds per square inch, a standard
unit of air pressure.
B-pillar
: The structural member at the
side of the vehicle behind the front door.
Bead area of the tire
: Area of the tire next
to the rim.
Sidewall of the tire
: Area between the
bead area and the tread.
Tread area of the tire
: Area of the perime-
ter of the tire that contacts the road whenmounted on the vehicle.
Rim
: The metal support (wheel) for a tire
or a tire and tube assembly upon whichthe tire beads are seated.
Maximum load rating
: a figure indicating
the maximum load in pounds and kilo-grams that can be carried by the tire. Thisrating is established by the tire manufac-turer.
Maximum permissible inflationpressure
: the greatest amount of air pres-
sure that should ever be put in the tire.This limit is set by the tire manufacturer.
Recommended tire inflation pressure
:
inflation pressure, established by Volvo,which is based on the type of tires that aremounted on a vehicle at the factory. Thisinformation can be found on the tire infla-

WHEELS AND TIRES
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541
Snow tires
Snow tires are designed for winter driving conditions.
Volvo recommends snow tires with specific dimensions. The tire dimensions vary depend-ing on engine type. When driving with snowtires, the correct type of tires must be moun-ted on all four wheels.
NOTE
Contact a Volvo dealer for advice on the best choice of rims and tires.
Tips for changing snow tiresWhen switching between regular tires and snow tires, mark the tires according to whichside they were mounted on, e.g. L for left and
R for right.
Studded tiresStudded tires should be broken in by driving500–1000 km (300–600 miles) slowly andgently to help the studs settle properly in thetires. This gives the tire, and especially thestuds, a longer service life.
NOTE
Regulations regarding the use of studded tires vary from country to country.
Tread depthRoad conditions with ice, slush and low tem- peratures place considerably higher demandson tires than summer conditions. Volvo there-fore recommends not driving on snow tiresthat have a tread depth of less than 4 mm(0.15 inch).
Related information
When changing wheels (p. 534)
Winter driving (p. 432)
Tread wear indicator (p. 523)
Snow chains
Using snow chains and/or snow tires can help improve traction in winter driving condi-tions.
Volvo does not recommend use of snow chains on wheel dimensions larger than18 inches.
WARNING
Use Volvo genuine snow chains or equiva- lent snow chains that are suitable for thevehicle model and the tire and wheel sizes.Only one-sided snow chains are permit-
ted. If uncertain about snow chains, Volvo rec- ommends contacting an authorized Volvoworkshop. Use of the wrong snow chainscould cause serious damage to the vehicleand result in an accident.

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WHEELS AND TIRES
542
CAUTION
Snow chains can be used on the vehicle, with the following restrictions:
Always follow the manufacturer'sinstallation instructions carefully. Installchains as tightly as possible andretighten periodically.
Only put snow chains on the frontwheels (also applies to all-wheel drivevehicles).
If accessory, aftermarket or "custom"tires and wheels with different dimen-sions than the original tires and wheelsare used, snow chains in some casesmay NOT be used. Sufficient distancebetween the chains and brakes, sus-pension and body components mustbe maintained.
Check local regulations regarding theuse of snow chains before installing.
Never exceed the snow chain manu-facturer's specified maximum speedlimit. Under no circumstances shouldyou exceed 50 km/h (30 mph).
Avoid bumps, holes or sharp turnswhen driving with snow chains.
Avoid driving on surfaces withoutsnow as this wears out both the snowchains and the tires.
The handling of the vehicle can be adversely affected when driving withchains. Avoid fast or sharp turns aswell as locked wheel braking.
Some types of strap-on chains affectbrake components and therefore mustNOT be used.
Consult a Volvo retailer for more information about snow chains.
Related information
Winter driving (p. 432)
Tire sealing system 14
The temporary tire sealing system can be used to seal a puncture in a tire or to checkand adjust the pressure in the tire. Models equipped with a spare wheel 15
do not
have the tire sealing system.
WARNING
California Proposition 65 Operating, servicing and maintaining a pas- senger vehicle can expose you to chemi-cals including engine exhaust, carbon mon-oxide, phthalates, and lead, which areknown to the State of California to causecancer and birth defects or other reproduc-tive harm. To minimize exposure, avoidbreathing exhaust, do not idle the engineexcept as necessary, service your vehicle ina well ventilated area and wear gloves orwash your hands frequently when servicingyour vehicle. For more information go towww.P65Warnings.ca.gov/passenger-vehicle.
The tire sealing system consists of a compres- sor and a bottle containing sealing compound.The sealing functions as a temporary repair.

SPECIFICATIONS
634
Approved tire pressure The following tire pressures are recom- mended by Volvo for your vehicle. Refer tothe tire inflation placard for information spe-cific to the tires installed on your vehicle atthe factory.
Tire dimensions
Cold tire pressure for up to five persons
Front
psi (kPa) Rear
psi (kPa)
255/40 R19 245/40 R20 38 (260)
38 (260)
Temporary spare tireT125/80R18 60 (420)
60 (420)
Related information
Type designations (p. 624)
Checking tire pressure (p. 527)
Recommended tire pressure (p. 529)

INDEX
646ventilation 213
whiplash protection 46
Security code 262 Sensors air quality 202
Camera unit 308
climate 198
Radar unit 305
Sensus connection and entertainment 30
Sensus Navigation Road Sign Information 339
Service position 620
Service program 562
Set time interval for Distance Alert 299settings Categories 132
contextual 130
resetting 131
Shiftlock 416
Side airbag 60
Side Impact Protection System 60, 61
SIM card 501 SIPS (Side Impact Protection Sys-
tem) 60, 61 Sirius Satellite radio Travel link 468
SiriusXM ® Satellite radio
traffic information 464, 465, 466
Ski hatch 560
Slippery conditions 432
Slippery road conditions 432
Snow chains 541
Software updates 33
Sound experience 453
Sound settings 452, 495 phone 496
playing media 474, 475
text message 495
Spare tire 539 handling 540
Speed camera information 339 Speed Limiter change speed 298
Speed symbols, tires 524
Spin control 269
Stability and traction control system 269 sport mode 270
Symbols and messages 272
Stains 605, 607, 608, 609 Start and lock system type designations 249Start battery 441, 579
overload 440
Start engine 398 Starting the engine after a collision 62
Start the vehicle 398
Steering assistance at risk of collision 351Steering power level, see Steering wheel
resistance 268
Steering wheel 194, 195 heating 214, 215
keypad 194
paddle 194
steering wheel adjustment 195
Steering wheel keypad 194
Steering wheel paddles 415Steering wheel resistance, speed-
dependent 268
Stone chips and scratches 617, 618
Storage compartments 552 center console 553
glove compartment 555
sun visor 557
Sunroof pinch protection 164

INDEX
648Troubleshooting
Adaptive Cruise Control 283
Camera unit 309
City Safety 324
Radar unit 309
Trunk electrical outlet 554
Lighting 160
Trunk lid emergency opening 256
locking/unlocking 253
open/close with foot movement 261
power-operated 258
unlocking from inside 255
Tunnel detection 153
Turn off engine 400
Turn signals 156Twin Engine general 380
Type approval HomeLink ® 448
radar system 306
U
Uniform Tire Quality Grading 526
Units 129
Unlocking settings 239
with key blade 247
USB socket for connecting media 480
V
Vehicle care 610, 611, 613, 614, 615, 616leather upholstery 608
Vehicle Event Data 33 Vehicle functions in the center display 119
Vehicle key bat. low 240Vehicle modem connecting vehicle to Internet 500
settings 501
Vehicle recovery 444
Vehicle status 567 inflation pressure 532
Vehicle upholstery 605, 607, 608, 609
Vehicle weight 629
Ventilation 203, 204 Seats 213
Video 478, 480 settings 479
Voice control 142
climate 199
phone 145
radio and media 146
settings 147
VOL mark 520
Volvo ID 26 create and register 27
W
Warning lightsAdaptive Cruise Control 296
airbags SRS 94
alternator does not charge 94
brake system error 94
low oil pressure 94
parking brake applied 94
Pilot Assist 296
seat belt reminder 94
stability and traction control system 269
starter battery not charging 94
system error 94
WARNING 94
Warning sound parking brake 409
warning symbols 94