2019 Alfa Romeo 4C Spider tire size

When cleaning extremely dirty wheels including exces-
sive brake dust, care must be taken in the selection of
tire and wheel cleaning chemicals and equipment to
prevent damage to the wheels. Select a non-abrasive,
non-acidic cleaner for aluminum or chrome wheels.
CAUTION!
Do not use scouring pads, steel wool, a bristle
brush, metal polishes or oven cleaner. These prod-
ucts may damage the wheel’s protective finish.
Such damage is not covered by the New Vehicle
Limited Warranty. Only car wash soap is recom-
mended.
NOTE: If you intend parking or storing your vehicle for
an extended period after cleaning the wheels with
wheel cleaner, drive your vehicle and apply the brakes
to remove the water droplets from the brake compo-
nents. This activity will remove the red rust on the
brake rotors and prevent vehicle vibration when brak-
ing. Dark Or Low Gloss Wheels
CAUTION!
If your vehicle is equipped with these specialty
wheels, DO NOT USE wheel cleaners, abrasives, or
polishing compounds. They will permanently dam-
age this finish and such damage is not covered by
the New Vehicle Limited Warranty. HAND WASH
ONLY USING MILD SOAP AND WATER WITH A
SOFT CLOTH. Used on a regular basis; this is all
that is required to maintain this finish.
Tire Chains (Traction Devices)
Use of traction devices require sufficient tire-to-body
clearance. Follow these recommendations to guard
against damage.
•
Traction device must be of proper size for the tire, as
recommended by the traction device manufacturer.
• Install on Rear Tires Only.
• Reduced size snow chains with a maximum projec-
tion of 7 mm beyond the tire profile can be fitted on
vehicles equipped with 235/40 R18 rear tire.
246 SERVICING AND MAINTENANCE

CAUTION!
To avoid damage to your vehicle or tires, observe
the following precautions:
•Because of restricted traction device clearance
between tires and other suspension components,
it is important that only traction devices in good
condition are used. Broken devices can cause
serious damage. Stop the vehicle immediately if
noise occurs that could indicate device breakage.
Remove the damaged parts of the device before
further use.
• Install device as tightly as possible and then
retighten after driving about ½ mile (0.8 km).
• Do not exceed 30 mph (48 km/h).
• Drive cautiously and avoid severe turns and large
bumps, especially with a loaded vehicle.
•
Do not drive for prolonged period on dry pavement.
• Observe the traction device manufacturer ’s in-
structions on the method of installation, operat-
ing speed, and conditions for use. Always use the
suggested operating speed of the device manufac-
turer ’s if it is less than 30 mph (48 km/h).
•
Do not use traction devices on a compact spare tire.
Tire Rotation Recommendations
Due to tire design and size, tire rotations on this vehicle
are not possible.
NOTE: For AR 4C models, where available, the vehicle
may be equipped with high performance tires that
guarantee high grip performance with little increase of
wear. Alfa Romeo, in collaboration with Pirelli, devel-
oped a specific high performance tire for the 4C model.
A dedicated Pirelli PZero, identified with an AR mark,
guarantees this vehicle to obtain the highest perfor-
mance capable.
DEPARTMENT OF TRANSPORTATION UNIFORM
TIRE QUALITY GRADES
The following tire grading categories were estab-
lished by the National Highway Traffic Safety Ad-
ministration. The specific grade rating assigned by
the tire’s manufacturer in each category is shown on
the sidewall of the tires on your vehicle.
All passenger vehicle tires must conform to Federal
safety requirements in addition to these grades. 8
SERVICING AND MAINTENANCE 247

Torque Specifications
Lug Nut/BoltTorque **Lug Nut/
Bolt Size Lug Nut/Bolt
Socket Size
72 Ft-Lbs (98 N·m) M12 x 1.25 17 mm
**Use only your authorized dealer recommended lug
nuts/bolts and clean or remove any dirt or oil before
tightening.
Inspect the wheel mounting surface prior to mounting
the tire and remove any corrosion or loose particles. Tighten the lug nuts/bolts in a star pattern until each
nut/bolt has been tightened twice. Ensure that the
socket is fully engaged on the lug nut/bolt (do not
insert it halfway).
After 25 miles (40 km) check the lug nut/bolt torque to
be sure that all the lug nuts/bolts are properly seated
against the wheel.
Wheel Mounting Surface
Torque Patterns
9
TECHNICAL SPECIFICATIONS 257

Wheel, Tilt............................27
Storage ............................ .53, 249
Storage, Vehicle ........................ .249
Storing Your Vehicle ..................... .249
Supplemental Restraint System – Air Bag .......110
Telescoping Steering Column .................27
Tilt Steering Column .......................27
Tire And Loading Information Placard .........231
Tire Markings .......................... .226
Tires....................133, 234, 242, 243, 247 Aging (Life Of Tires) ....................239
Air Pressure ......................... .234
Chains ............................. .246
Changing ........................... .225
Compact Spare ....................... .243
General Information ..............234, 242, 243
High Speed ......................... .236
Inflation Pressure ..................... .236
Jacking ............................ .225
Life Of Tires ......................... .239
Load Capacity .....................231, 232
Pressure Monitoring System (TPMS) .......78, 94
Quality Grading ...................... .247
Radial ............................. .237Replacement
......................... .240
Rotation ............................ .247
Safety .......................... .226, 234
Sizes .............................. .227
Snow Tires .......................... .242
Spare Tires ....................242, 243, 244
Spinning ........................... .238
Tread Wear Indicators ...................239
Wheel Nut Torque .....................256
Tire Safety Information ....................226
To Open Deck Lid ........................50
Towing .............................. .160
Disabled

Vehicle ...................... .191
Recreational ......................... .160
Towing Behind A Motorhome ...............160
Towing Eyes ........................... .191
Traction .............................. .161
Trailer Towing ......................... .160
Transaxle Automatic ............................18
Transmission .......................... .141
Automatic .......................... .141
Fluid .............................. .224
Maintenance ......................... .224
Transporting Pets ....................... .129
284 INDEX