Dodge Viper SRT-10 (ZB). Manual — part 225

(9) Verify that the TPM module has been pro-

grammed with the identification code from the new
tire pressure sensor/transmitter using the DRBIII

t

scan tool. If the identification code and tire pressure
thresholds from the new tire pressure transmitter
are present in the receivers memory the new tire
pressure transmitter has been correctly programmed
to the receiver.

TIRES

DESCRIPTION - TIRES

The tires used on this vehicle are the Michelin

Pilot SPORT Zero Pressure. These tires are designed
and engineered for their specific use on this vehicle.
The Zero Pressure designation means that the tire
has been designed to be driven for a distance of up to
50 miles (80 kilometers) at a maximum speed of up
to 55 mile per hour (89 km/h) with zero air pressure
in the tire. This is an important feature considering
this vehicle is not equipped with a spare tire.

These tires have a directional tread pattern. That

means the tire is designed to rotate in a certain
direction at speed. The tire sidewall has markings
showing which direction the tire is to rotate when
the vehicle is moving in the forward direction.

With proper care and driving habits, these tires

will give excellent reliability, traction, skid resis-
tance, and tread life. Driving habits will have more
effect on tire life than any other factor. Careful driv-
ers will obtain, in most cases, much greater mileage
than severe use or careless drivers. A few of the driv-
ing habits which will shorten the life of any tire are:

• Rapid acceleration

• Severe application of brakes

• High-speed driving

• Taking turns at excessive speeds

• Striking curbs and other obstacles
Tire type, size, load index and speed rating are

encoded in the letters and numbers imprinted on the
side wall of the tire. Refer to the Tire Identification
chart to decipher the code. For example purposes, the
tire size P225/60 R 16 97 T is used in the chart. This
vehicle uses 2 different size tires, front and rear:

• Front — 275/35 ZR 18

• Rear — 345/30 ZR 19

TIRE IDENTIFICATION

P

TIRE TYPE (Not

present on all tires)

P - Passenger

T - Temporary

C - Commercial

LT - Light Truck

225

SECTIONAL WIDTH

SHOWN IN MILLIME-
TERS

60

ASPECT RATIO

SECTIONAL HEIGHT
÷ SECTIONAL
WIDTH (Refer to
Aspect Ratio Figure
20 )

R

CONSTRUCTION

TYPE

R - RADIAL

B - BIAS BELTED

D - DIAGONAL
(BIAS)

16

WHEEL DIAMETER

SHOWN IN INCHES

97

LOAD INDEX

*

T

SPEED RATING

*

* NOTE: Consult the tire manufacturer regarding
any questions on tire specifications or capabilities.

Fig. 20 Tire Aspect Ratio

1 - SECTIONAL WIDTH
2 - SECTIONAL HEIGHT

22 - 12

TIRES/WHEELS

ZB

SENSOR - TPM (Continued)

DIAGNOSIS AND TESTING

TIRE NOISE AND VIBRATION

Radial-ply tires are sensitive to force impulses

caused

by

improper

mounting,

vibration,

wheel

defects, or possibly tire imbalance.

To find out if tires are causing a noise or vibration,

drive the vehicle over a smooth road at varying
speeds. Note the noise level during acceleration and
deceleration. Engine, differential and exhaust noises
will change as speed varies, while tire noise will usu-
ally remain constant.

Unusual tire noise can be associated with tire and

wheel vibration. For vibration, (Refer to 22 - TIRES/
WHEELS - DIAGNOSIS AND TESTING), (Refer to
22 - TIRES/WHEELS - STANDARD PROCEDURE).
For irregular tire wear, (Refer to 22 - TIRES/
WHEELS/TIRES - DIAGNOSIS AND TESTING).

TIRE TREAD WEAR INDICATORS

Tread wear indicators are molded into the bottom

of the tread grooves. When tread depth is at 1.6 mm
(1/16 in.), the tread wear indicators will appear as a
13 mm (1/2 in.) band across the tread groove in the
tire.

Tire replacement is necessary when wear indica-

tors appear in two or more tread grooves or if local-
ized balding occurs (Fig. 21).

TIRE TREAD WEAR PATTERNS

Abnormal tire tread wear can be caused by:
• Incorrect inflation pressure

• Tire/wheel unbalance

• Worn suspension components

• Improper brake operation

• Bent wheels

• Incorrect front wheel alignment

• Excessive speed when turning the vehicle
In most situations, inspection of the tire tread

wear will reveal the cause of the abnormal wear. The
illustration below (Fig. 22) shows the various types of
tire tread wear patterns and the recommended cor-
rective action.

Fig. 22 Abnormal Tire Tread Wear Patterns

Fig. 21 Tread Wear Indicators

1 - TREAD ACCEPTABLE
2 - TREAD UNACCEPTABLE
3 - WEAR INDICATOR

ZB

TIRES/WHEELS

22 - 13

TIRES (Continued)

Rapid wear from the tire tread shoulders (Fig. 22)

is usually caused by under- inflation. If this type of
wear occurs and the tires are serviceable, inflate the
tires to their recommended cold inflation pressure.

Rapid wear from the center of tire tread (Fig. 22) is

usually caused by over- inflation. If this type of wear
occurs and the tires are serviceable, inflate them
with the recommended air inflation pressure when
they are cold.

Cracked treads (Fig. 22) are usually caused by

under-inflation or excessive high-speed vehicle opera-
tion. Tires with cracked treads should be replaced
and the replacement tires should be properly main-
tained to avoid a recurrence of the failure.

Excessive wear from one tread shoulder (Fig. 22)

can be caused by excessive speed on turns or by an
incorrect camber angle. An incorrect negative camber
angle will cause excessive wear from the tire inside
shoulder. An incorrect positive camber angle will
cause excessive wear from the tire outside shoulder.
If this type of tread wear occurs, measure the camber
angle. If the camber angle is within the specified lim-
its, caution the owner about excessive speed when
turning.

An incorrect wheel toe position will cause the tire

tread surface to develop a feathered edge (Fig. 22).
One side of the tread will be rounded while the oppo-
site side will have a feathered edge. This type of
tread wear indicates that the tire is side slipping and
scuffing as it moves over the street/road surface.

A feathered tread edge that faces toward the vehi-

cle indicates an excessive wheel toe-in position. A
feathered tread edge that faces away from the vehicle
indicates an excessive wheel toe-out position. The
direction that a feathered edge has developed can be
determined by moving the tips of your fingers over
the tire tread surface. Bent steering components
can also cause this type of tire tread wear.

If a feathered edge develops on the tread of a

tire(s), measure and correct the wheel toe position as
necessary.

TIRE/VEHICLE LEAD

Use the following diagnosis chart to aid in diagnos-

ing a vehicle that has a lead or drift problem.

22 - 14

TIRES/WHEELS

ZB

TIRES (Continued)

Vehicle Lead Correction Diagnosis Chart

ZB

TIRES/WHEELS

22 - 15

TIRES (Continued)