WHEELS AND TIRES
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529
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. 526)
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
547
If one of the front tires needs to be replaced with a spare tire:
1. Use the spare tire to replace the rear tire
on the same side of the vehicle as the flat tire.
2. Move the rear tire to the front to replace the flat tire.
Related information
Spare wheel (p. 545)
Tool kit (p. 540)
Removing a wheel (p. 542)
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. 540)
Winter driving (p. 433)
Tread wear indicator (p. 529)
WHEELS AND TIRES
548
Snow chainsUsing 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 other than 7.5x18ET 45 235/45. Volvo does not recommenduse of snow chains on for Polestar Engi-neered, but AutoSock can be used as a sup-plement to winter tires for the wheel dimen-sion 8x19 ET 42 235/40.
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.
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. 433)
SPECIFICATIONS
651
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)
235/45 R18 235/40 R19 39 (270)
39 (270)
Temporary spare tireT125/80 R18 60 (420)
60 (420)
Related information
Type designations (p. 640)
Checking tire pressure (p. 533)
Recommended tire pressure (p. 535)
INDEX
664
S
Safety 42pregnancy 43
Safety belt, see Seat belt 47
Safety defects, reporting 44
Safety mode 61 starting/moving 62
Sealing compound 549
Seat, see Seats 184
Seat belt reminder 51
Seat belts 47 Automatic locking retractor/Emer-
gency locking retractor 65
buckling/unbuckling 48
pregnancy 43
seat belt reminder 51
seat belt tensioner 50
securing child restraint systems 67, 69, 72
Seat belt tensioner 50 resetting 51
Seats heating 212, 213
manual front seat 184
power front seats 185
store position 186, 187
ventilation 213
whiplash protection 46
Security code 262 Sensors air quality 205
Camera unit 308
climate 200
Radar unit 305
Sensus connection and entertainment 30
Sensus Navigation Road Sign Information 339
Service position 635
Service program 576
Set time interval for Distance Alert 299settings Categories 132
contextual 130
resetting 131
Shiftlock 418
Side airbag 60
Side Impact Protection System 60
SIM card 507
SIPS (Side Impact Protection System) 60 Sirius Satellite radio Travel link 474SiriusXM ® Satellite radio
traffic information 470, 471, 472
Ski hatch 568
Slippery conditions 433, 434
Slippery road conditions 434
Snow chains 548
Software updates 33
Sound experience 459
Sound settings 458, 501 phone 502
playing media 480, 481
text message 501
Spare tire 545 handling 546
Speed camera information 339 Speed Limiter change speed 298
Speed symbols, tires 530
Spin control 269
Stability and traction control system 269 sport mode 270, 271
Symbols and messages 272
Stains 619, 621, 622, 623 Start and lock system type designations 248
INDEX
666Tire tread 529
Tools 540Top tether anchors (child restraint sys-
tems) 73
Top view 129
Total airing function 234
Towing 448
Towing capacity and towball load 646
Towing eyelet 449TPMS - Tire Pressure Monitoring Sys-
tem 535
Traction control 269
Traffic information 466 Trailer
driving with a trailer 444
Lamps 447
swaying 446
Trailer Stability Assist 270 trailer 446
Trailer stabilizer 270, 446
Transmission 414 automatic 414, 415
Transmission fluid grade 649
Travel Link 474 Fuel 477
Notifications 476
Sports 478
weather 475
Tread depth 529 winter tires 547
Tread wear indicator 529
Trip computer 85 display in instrument panel 87
Trip odometer 85
Trip odometer resetting 88
Trip statistics 88 settings 89
Troubleshooting Adaptive Cruise Control 283
Camera unit 309
City Safety 324
Radar unit 309
TSA - Trailer Stability Assist 446
Tunnel detection 154
Turn off engine 402
Turn signals 156 Twin Engine general 382
Type approval HomeLink ® 454
radar system 306U
Uniform Tire Quality Grading 532
Units 129Unlocking settings 237
with key blade 246
USB socket for connecting media 486
V
Vehicle care 624, 625, 627, 628, 629, 630
leather upholstery 622
Vehicle Event Data 33 Vehicle functions in the center display 119
Vehicle key bat. low 239 Vehicle modem connecting vehicle to Internet 506
settings 507
Vehicle recovery 450
Vehicle status 581 inflation pressure 538
Vehicle upholstery 619, 621, 622, 623