2012 Seat Mii wheel size

210Vehicle care and maintenance
Wheels and tyres
Introduction
SEAT recommend that all work on tyres and wheels is carried out by a Speci-
alised workshop. They have the necessary special tools and replacement
parts, trained personnel and facilities for disposing of the old tyres. SEAT
recommends visiting a Technical Service.
Additional information and warnings:
● Transporting ⇒ page 97
● Braking, stopping and parking ⇒ page 134
● Caring for and cleaning the vehicle exterior ⇒ page 197
● Notes for the user ⇒ page 233
● Vehicle tool kit ⇒ page 246
● Wheel trims ⇒ page 248
● Change wheel ⇒ page 250
● Tire Mobility Set ⇒ page 256
WARNING
The vehicle cannot be totally controlled or braked if the tyres (new or
used) are worn or damaged.
● Incorrect use of wheels and tyres could make driving more dangerous
and result in serious accidents and damage.
● All four wheels must be fitted with radial tyres of the same type, size
(rolling circumference) and the same tread pattern.
● New tyres do not give maximum grip and will not have reached their
maximum braking capacity to start with, and therefore need running in.
To prevent accidents and major damage, extreme caution should be tak-
en for the first 600 km (400 miles).
WARNING (Continued)
● Check tyre pressures regularly and ensure they are maintained at the
pressures indicated. If the tyre pressure is too low, the tyres could over-
heat, resulting in tread detachment or even burst tyres.
● Never drive on damaged (punctured, cut, cracked or dented) or worn
tyres. Driving on damaged or worn tyres could result in burst tyres, seri-
ous accidents or damage. Worn or damaged tyres must be replaced im-
mediately.
● Never exceed the maximum permitted speed or loads specified for the
type of tyre fitted on your vehicle.
● The efficiency of driver and brake assist systems also depends on the
grip of the tyres.
● If you notice unusual vibration or if the vehicle pulls to one side when
driving, stop the vehicle immediately and check the tyres and wheels for
damage.
● To minimise the risk of losing control of the vehicle or causing a seri-
ous accident, never undo the bolted joints of beadlock wheels.
● Never mount used tyres or wheels if you are not sure of their previous
history. They may be damaged, although the damage is not immediately
visible.
● Old tyres, even if they have never been used, may lose air or burst un-
expectedly while driving, especially at high speeds, resulting in serious
accident and injury. If tyres are over six years old, they should only be
used in an emergency and with extreme caution.
Note
For technical reasons, it is not generally possible to use the wheels from
other vehicles. In some cases, this may also be true for the same model of
wheel. Please refer to the vehicle documents or ask at a Technical Service. 

213
Vehicle care and maintenance
WARNING
The use of worn or damaged wheel trims could make driving more dan-
gerous and result in serious accidents and damage.
● Only wheel trims which have been approved for use with your vehicle
should be used.
● Inspect wheel trims regularly for damage and replace as required.
WARNING
If the bolted joints of wheel trims with bolted ring trims are not correctly
tightened or loosened, this could result in serious accident.
● Never loosen the bolted joints of wheel trims with bolted ring trims.
● Any work relating to wheel trims with bolted trims should be carried
out at Specialised workshop. SEAT recommends visiting a Technical Serv-
ice.

Replacement of new tyres and wheel trims
New tyres
● When tyres are new, drive with extreme caution for the first 600 km
(400 miles), as all tyres need to be run-in. Tyres which have not been run-in
do not have such good grip ⇒ 
or braking capacity ⇒ .
● All four wheels must be fitted with radial tyres of the same type, size
(rolling circumference) and the same tread pattern.
● The tread depth of new tyres may vary, according to the type and make
of tyre and the tread pattern. Replacing tyres
●
Where possible, always replace both wheels on an axle (both wheels on
the front axle or both wheels on the rear axle) ⇒ 
.
● Only replace used tyres with those authorised by SEAT for the corre-
sponding type vehicle. Pay special attention to size, diameter, and maxi-
mum load and speed capacity.
● Never use tyres which are larger than SEAT approved tyres. If the tyres
are too big, they may knock or rub against the chassis or other components,
resulting in damage.
WARNING
New tyres do not give maximum grip and will not have reached their max-
imum braking capacity to start with, and therefore need running in.
● To prevent accidents and major damage, extreme caution should be
taken for the first 600 km (400 miles).
WARNING
There should be adequate space between the tyres and the vehicle in ac-
cordance with the vehicle design. If this is not the case, the tyres may
rub against parts of the running gear, chassis or brake lines, leading to
faults in the brake system or to tread detachment, and the risk of burst
tyres.
● The true tyre dimension should not be greater than the dimensions of
tyres manufactured and approved by SEAT and should not rub against
parts of the vehicle.
Note
Although tyres may be shown as being the same size, the true dimensions
of different types of tyre may vary with respect to the nominal size, or tread
patterns may be different. 
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219
Vehicle care and maintenance
Radial
Rim diameter code
Load index & speed rating
DOT tyre identification number
Severe snow conditions
Tyre ply composition and materials used
Max. load rating
Treadwear, traction and temperature grades
Max. permissible inflation pressure
Passenger vehicle tyre
Nominal width of tyre in millimetres
Ratio of height to width (aspect ratio)
Tyre code (example)MeaningMake, logotypeManufacturerProduct nameName of tyre assigned by manufacturer.P255 / 55 R 18Size:PPassenger vehicle code.255Nominal width between walls, in mm.55Height/width ratio in %RTyre type (R indicates "radial").18Rim diameter in inches109 HLoad index ⇒ page 220 and speed rating
⇒ page 220.
XL(“Reinforced”) tyres.M+S or M/S or Winter tyres code (mud and snow tyres).RADIAL TUBELESSRadial tyre without inner tube.E4 ...E-mark certifying tyre complies with internation-
al legislation followed by a number denoting the
country granting the authorisation. The authori-
sation number ( several digits) is shown below.
123456789101112
Tyre code (example)MeaningDOT BT RA TY5 1709Tyre identification number (TIN a)
, may be only on
interior wall of wheel) and date of manufacture:
DOTThe tyre complies with the legal require-
ments of the US Department of Trans-
port, responsible for tyre safety regula-
tions.
BTPlace of manufacture code.RAInformation about manufacturer and tyre
size.
TY5Manufacturer's tyre specifications.1709Date of manufacture: Week 17 of 2009.TWIThis identifies the position of the Tread Wear In-
dicator ⇒ page 215.
Made in GermanyCountry of manufacture.MAX LOAD 615 KGUS load rating, indicating maximum permitted
load per tyre.
MAX INFLATION 350 KPA
(51 PSI)US limit, indicating maximum permitted tyre
pressure.
SIDEWALL 1 PLY RAYONInformation about tyre wall components:
1 layer of rayon (artificial silk).
TREAD 4 PLIES
1 RAYON + 2 STEEL +
1 NYLONInformation about tread components:
In the example, there are 4 layers below the
tread: 1 layer of rayon (artificial silk), 2 layers of
steel reinforcement and 1 layer of nylon.
Information for the end consumer concerning the comparative values of
the established base tyres (standardised test procedures) ⇒ page 233:
TREADWEAR 220Relative service life of the tyre, with respect to
specific US standard test.
TRACTION ABraking capacity of tyre on wet surface (AA, A, B
or C).
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220Vehicle care and maintenance
Tyre code (example)MeaningTEMPERATURE ATyre temperature resistance at higher test
speeds (A, B or C).
If the tyre has other markings, these are specific tyre manufacturer codes
or specific national codes, e.g. for Brazil or China.
a)
The letters TIN refer to the tyre serial number.
Tyres with directional tread pattern
Tyres with directional tread pattern have been designed to operate best
when rotating in only one direction. An arrow on the tyre sidewall indicates
the direction of rotation on tyres with directional tread. Always observe the
direction of rotation indicated when mounting the wheel. This guarantees
optimum grip and helps to avoid aquaplaning, excessive noise and wear.
If the tyre is mounted in the opposite direction of rotation, drive with ex-
treme caution, as the tyre is no longer being used correctly. This is of partic-
ular importance when the road surface is wet. Change the tyre as soon as
possible or remount it with the correct direction of rotation.
Tyre load rating
The load rating code indicates the maximum load in kilograms each wheel
can carry (load capacity).
425 kg
462 kg
487 kg
515 kg
545 kg
615 kg
Speed rating
The speed rating indicates the maximum speed permitted for the tyres.
max. 150 km/h (93 mph)
max. 160 km/h (99 mph)
78
81
83
85
87
91
P
Q max. 170 km/h (106 mph)
max. 180 km/h (112 mph)
max. 190 km/h (118 mph)
max. 200 km/h (124 mph)
max. 210 km/h (130 mph)
max. 240 km/h (149 mph)
max. 240 km/h (149 mph)
max. 270 km/h (168 mph)
max. 300 km/h (186 mph)
Some manufacturers use the letters “ZR” for tyres with a maximum author-
ised speed above 240 km/h (149 mph). 
Snow chains
When using snow chains, applicable local legislation and maximum permit-
ted speed limits must be observed.
In winter weather, snow chains not only help to improve grip but also im-
prove the braking capacity.
The fitting of chains is permitted only on front wheels and only with the fol-
lowing combinations of wheel trims and tyres :
Tyre sizeWheel rim165/70 R145 J x 14 offset of 35
SEAT recommends you ask a Technical Service for further information on
wheel, tyre and chain sizes.
Wherever possible use fine-link chains measuring less than 15 mm includ-
ing the lock. 
R
S
T
U
H
V
Z
W
Y

221
Vehicle care and maintenance
Remove wheel hub covers and trim rings before fitting snow chains ⇒ 
.
The wheel bolts should be covered with caps for safety reasons. These are
available from Technical Services.
Temporary spare wheel
For technical reasons, snow chains must not be used on the compact tem-
porary spare wheel ⇒ page 217.
If it is necessary to fit chains with the temporary spare wheel in use, install
the temporary spare wheel on the rear axle in the event of a fault in a front
wheel. Then, fit the rear wheel that is free, instead of the damaged front
wheel. In this situation, observe the rotating direction of the wheels. SEAT
recommends attaching the snow chains before fitting the wheel.
WARNING
The use of unsuitable or incorrectly fitted chains could lead to serious ac-
cidents and damage.
● Always the appropriate snow chains.
● Observe the fitting instructions provided by the snow chain manufac-
turer.
● Never exceed the maximum permitted speeds when driving with snow
chains.
CAUTION
● You must remove the snow chains to drive on roads which are free of
snow. Otherwise they will impair handling, damage the tyres and wear out
very quickly.
● Wheel trims may be damaged or scratched if the chains come into direct
contact with them. SEAT recommends the use of covered snow chains.
Note
Snow chains are available in different sizes according to the vehicle type. 
Vehicle diagramPrior to a journey...While drivingCare, cleaning and mainte-
nanceIf and whenTechnical Data