2019 Hyundai Ioniq Electric inflation pressure

7-35
7
Maintenance
Temperature - A, B & C
The temperature grades are A (the
highest), B and C representing the
tire’s resistance to the generation of
heat and its ability to dissipate heat
when tested under controlled condi-
tions on a specified indoor laboratory
test wheel.
Sustained high temperature can
cause the material of the tire to
degenerate and reduce tire life, and
excessive temperature can lead to
sudden tire failure. Grade C
responds to a level of performance
which all passenger car tires must
meet under the Federal Motor
Vehicle Safety Standard No. 109.
Grades B and A represent higher
levels of performance on the labora-
tory test wheel than the minimum
required by law.
Tire Terminology and
Definitions
Air Pressure
The amount of air inside the tire
pressing outward on the tire. Air
pressure is expressed in pounds per
square inch (psi) or kilopascal (kPa).
Accessory Weight
This means the combined weight of
optional accessories. Some exam-
ples of optional accessories are
automatic transmission, power
seats, and air conditioning.
Aspect Ratio
The relationship of a tire's height to
its width.
Belt
A rubber coated layer of cords that is
located between the plies and the
tread. Cords may be made from steel
or other reinforcing materials.
The temperature grade for this
tire is established for a tire that
is properly inflated and not
overloaded. Excessive speed,
under-inflation, over-inflation,
or excessive loading, either
separately or in combination,
can cause heat build-up and
possible sudden tire failure.
This may cause loss of vehicle
control resulting in an accident.
WARNING

7-36
Maintenance
Bead
The tire bead contains steel wires
wrapped by steel cords that hold the
tire onto the rim.
Bias Ply Tire
A pneumatic tire in which the plies
are laid at alternate angles less than
90 degrees to the centerline of the
tread.
Cold Tire Pressure
The amount of air pressure in a tire,
measured in pounds per square inch
(psi) or kilopascals (kPa) before a tire
has built up heat from driving.
Curb Weight
This means the weight of a motor
vehicle with standard and optional
equipment including the maximum
capacity of fuel, oil and coolant, but
without passengers and cargo.
DOT Markings
A code molded into the sidewall of a
tire signifying that the tire is in com-
pliance with the U.S. Department of
Transportation motor vehicle safety
standards. The DOT code includes
the Tire Identification Number (TIN),
an alphanumeric designator which
can also identify the tire manufactur-
er, production plant, brand and date
of production.
GVWR
Gross Vehicle Weight Rating
GAWR FRT
Gross Axle Weight Rating for the
Front Axle.
GAWR RR
Gross Axle Weight Rating for the
Rear axle.
Intended Outboard Sidewall
The side of an asymmetrical tire, that
must always face outward when
mounted on a vehicle.
Kilopascal (kPa)
The metric unit for air pressure.
Light truck(LT) tire
A tire designated by its manufacturer
as primarily intended for use on light-
weight trucks or multipurpose pas-
senger vehicles.
Load ratings
The maximum load that a tire is rated
to carry for a given inflation pressure.
Load Index
An assigned number ranging from 1
to 279 that corresponds to the load
carrying capacity of a tire.

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7
Maintenance
Maximum Inflation Pressure
The maximum air pressure to which
a cold tire may be inflated. The max-
imum air pressure is molded onto the
sidewall.
Maximum Load Rating
The load rating for a tire at the maxi-
mum permissible inflation pressure
for that tire.
Maximum Loaded VehicleWeight
The sum of curb weight; accessory
weight; vehicle capacity weight; and
production options weight.
Normal Occupant Weight
The number of occupants a vehicle
is designed to seat multiplied by 150
pounds (68 kg).
Occupant Distribution
Designated seating positions.
Outward Facing Sidewall
An asymmetrical tire has a particular
side that faces outward when mount-
ed on a vehicle. The outward facing
sidewall bears white lettering or
bears manufacturer, brand, and/or
model name molding that is higher or
deeper than the same moldings on
the inner facing sidewall.
Passenger (P-Metric) tire
A tire used on passenger cars and
some light duty trucks and multipur-
pose vehicles.
Ply
A layer of rubber-coated parallel
cords.
Pneumatic tire
A mechanical device made of rubber,
chemicals, fabric and steel or other
materials, that, when mounted on an
automotive wheel provides the trac-
tion and contains the gas or fluid that
sustains the load.
Pneumatic options weight
The combined weight of installed
regular production options weighing
over 5 lb. (2.3 kg) in excess of the
standard items which they replace,
not previously considered in curb
weight or accessory weight, includ-
ing heavy duty breaks, ride levelers,
roof rack, heavy duty battery, and
special trim.
Recommended InflationPressure
Vehicle manufacturer's recommend-
ed tire inflation pressure as shown
on the tire placard.

7-38
Maintenance
Radial Ply Tire
A pneumatic tire in which the ply
cords that extend to the beads are
laid at 90 degrees to the centerline of
the tread.
Rim
A metal support for a tire and upon
which the tire beads are seated.
Sidewall
The portion of a tire between the
tread and the bead.
Speed Rating
An alphanumeric code assigned to a
tire indicating the maximum speed at
which a tire can operate.
Traction
The friction between the tire and the
road surface. The amount of grip pro-
vided.
Tread
The portion of a tire that comes into
contact with the road.
Treadwear Indicators
Narrow bands, sometimes called
"wear bars", that show across the
tread of a tire when only 1/16 inch of
tread remains.
UTQGS
Uniform Tire Quality Grading
Standards is a tire information sys-
tem that provides consumers with
ratings for a tire's traction, tempera-
ture and treadwear. Ratings are
determined by tire manufacturers
using government testing proce-
dures. The ratings are molded into
the sidewall of the tire.
Vehicle Capacity Weight
The number of designated seating
positions multiplied by 150 lbs. (68
kg) plus the rated cargo and luggage
load.
Vehicle Maximum Load on theTire
Load on an individual tire due to curb
and accessory weight plus maximum
occupant and cargo weight.
Vehicle Normal Load on the Tire
Load on an individual tire that is
determined by distributing to each
axle its share of the curb weight,
accessory weight, and normal occu-
pant weight and dividing by 2.
Vehicle Placard
A label permanently attached to a
vehicle showing the original equip-
ment tire size and recommended
inflation pressure.

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7
Maintenance
All Season Tires
HYUNDAI specifies all season tires
on some models to provide good
performance for use all year round,
including snowy and icy road condi-
tions. All season tires are identified
by ALL SEASON and/or M+S (Mud
and Snow) on the tire sidewall. Snow
tires have better snow traction than
all season tires and may be more
appropriate in some areas.
Summer Tires
HYUNDAI specifies summer tires on
some models to provide superior
performance on dry roads. Summer
tire performance is substantially
reduced in snow and ice. Summer
tires do not have the tire traction rat-
ing M+S (Mud and Snow) on the tire
side wall. If you plan to operate your
vehicle in snowy or icy conditions,
HYUNDAI recommends the use of
snow tires or all season tires on all
four wheels.
Snow Tires
If you equip your car with snow tires,
they should be the same size and
have the same load capacity as the
original tires. Snow tires should be
installed on all four wheels; other-
wise, poor handling may result. Snow
tires should carry 4 psi (28 kPa)
more air pressure than the pressure
recommended for the standard tires
on the tire label on the driver’s side of
the center pillar, or up to the maxi-
mum pressure shown on the tire
sidewall, whichever is less. Do not
drive faster than 75 mph (120 km/h)
when your vehicle is equipped with
snow tires.
Radial-Ply Tires
Radial-ply tires provide improved
tread life, road hazard resistance and
smoother high speed ride. The radi-
al-ply tires used on this vehicle are of
belted construction, and are selected
to complement the ride and handling
characteristics of your vehicle.
Radial-ply tires have the same load
carrying capacity, as bias-ply or bias
belted tires of the same size, and use
the same recommended inflation
pressure. Mixing of radial-ply tires
with bias-ply or bias belted tires is
not recommended. Any combina-
tions of radial-ply and bias-ply or bias
belted tires when used on the same
vehicle will seriously deteriorate
vehicle handling. The best rule to fol-
low is: Identical pairs of radial-ply
tires should always be used as a set
for the front tires and a set for the
rear tires.

8-4
Specifications, Consumer information and Reporting safety defects
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When replacing tires, use the same size originally supplied with the vehicle.
Using tires of a different size can damage the related parts or not work properly.
CAUTION
If your vehicle is not equipped with a compact spare tire, your vehicle will be equipped with a Tire Mobility Kit.
Items Tire SizeWheel Size
Inflation Pressure kPa (psi)Wheel Lug Nut Torque kgf
•m
(lbf
ft, Nm)Normal LoadMaximum Load
FrontRearFrontRear
Full size tire205/55 R166.5J X 16250 (36)235 (34)250 (36)235 (34)11~13
(79~94, 07~127)
It is permissible to add 3 psi to the standard tire pressure specification if colder temperatures are expect- ed soon.
Tires typically loose 1psi (7kPa) for every 12°F temperature drop. If extreme temperature variations are
expected, recheck your tire pressure as necessary to keep them properly inflated.
An air pressure generally decreases, as you drive up to a high-altitude area above sea level. Thus, if you plan to drive a high-altitude area, check the tire pressures in advance. If necessary, inflate them to a prop-
er level. (Air inflation per altitude : +2.4 psi/1 mile)
NOTICE

I-4
Charging door .................................................................3-50
Checking tire inflation pressure ......................................7-28
Child restraint system (CRS) ..........................................2-36Booster seats...............................................................2-39
Forward-facing child restraint system........................2-39
Installing a child restraint system (CRS) ...................2-39
Lower anchors and tether for children (LATCH system) .....................................................2-40
Rearward-facing child restraint system......................2-38
Securing a child restraint system seat with "Tether Anchor" system ..........................................2-43
Securing a child restraint system with a lap/ shoulder belt ............................................................2-44
Securing a child restraint system withthe LATCH anchors system ........................................................2-42
Selecting a child restraint system (CRS) ...................2-37
Child-protector rear door lock ........................................3-12
Climate control air filter replacement.............................7-18
Clock ........................................................................\
.....3-135
Clothes hanger ..............................................................3-135
Combined instrument, see instrument cluster ................3-51
Consumer information ......................................................8-9
Coolant ........................................................................\
....7-12
Cooling fluid, see coolant ...............................................7-12
Cruise control system .....................................................5-73
Cup holder.....................................................................3-1\
30
Curtain air bags ...............................................................2-51 Dashboard illumination, see instrument panel
illumination..................................................................3-52
Dashboard, see instrument cluster ..................................3-51
Day/night rearview mirror ..............................................3-19
Daytime running light (DRL) .........................................3-95
Defogging (Windshield) ...............................................3-125
Defroster ........................................................................\
3-111 Rear window defroster .............................................3-111
Defrosting (Windshield) ...............................................3-125
Dimensions .......................................................................8\
-2
Display illumination, see instrument panel illumination..................................................................3-52
Displays, see instrument cluster .....................................3-51
Distance to empty ...........................................................3-55
Door locks ........................................................................\
.3-9 Auto door lock/unlock features ..................................3-12
Central door lock switch ............................................3-11
Child-protector rear door lock....................................3-12
Drinks holders, see cup holders ....................................3-130
Drive mode integrated control system ............................5-36 ECO mode ..................................................................5-36
SPORT mode ..............................................................5-37
Driver Attention Warning (DAW) System......................5-68
Driver position memory system .....................................3-14 Easy access function ..................................................3-15
Recalling memory positions .......................................3-15
Storing memory positions ..........................................3-14
Index
D

I-10
Paddle shifter (Regenerative braking control) ................5-16
Parking lamp position .....................................................3-96
Passenger's front air bag .................................................2-49
Power brakes ...................................................................5-17
Power button .....................................................................5-5\
POWER button positions .............................................5-6
Starting the vehicle .......................................................5-8
Turning off the vehicle .................................................5-9
Power outlet ..................................................................3-132
Power steering.................................................................3-16
Power window lock switch .............................................3-41
Pre-tensioner seat belt .....................................................2-29
Puddle lamp ..................................................................3-105
Rear center seatbelt .........................................................2-32
Rear seat adjustment .......................................................2-12 Armrest .......................................................................2\
-15
Folding the rear seat ...................................................2-12
Rear seat head restraints .................................................2-19 Adjusting the height up and down .............................2-19
Removal/Reinstall ......................................................2-20
Rear seat warmers ...........................................................2-22
Rear view monitor ........................................................3-105
Recommended cold tire inflation pressures ...................7-27 Recommended lubricants and capacities ..........................8-6
Reduction gear ................................................................5-10
Gear position ..............................................................5-10
Good driving practices ...............................................5-15
LCD display messages ...............................................5-12
Shift-lock system ........................................................5-12
When the battery (12 V) is discharged ......................5-12
Refrigerent label ...............................................................8-8
Regenerative braking rate indicator ................................3-57
Removable towing hook .................................................6-22
Replacement light bulb ...................................................7-55
Reporting safety defects .................................................8-10
Rocking the vehicle ........................................................5-95
Rotation (Tire) ................................................................7-29
Safety messages ................................................................F-6
Scheduled maintenance services.......................................7-7
Seat belt warning light Driver's seat ................................................................2-24
Front passenger's seat .................................................2-25
Seat belts ........................................................................\
.2-23 Additional seat belt safety precautions ......................2-32
Care of seat belts ........................................................2-35
Do not lie down ..........................................................2-34
Height adjustment ......................................................2-27
Keep belts clean and dry ............................................2-35
Lap/shoulder belt ........................................................2-26
Index
S
P
R