SsangYong Actyon Sports II. Manual — part 169

14-12

OVM Tools

Location

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Valve insert

Spare tire

Jack (pantograph jack)

Wheel wrench

Jack connection

Driver (+, -)

Spanner

1.

2.

3.

4.

5.

14-13

4170-09

Structure of Tire

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Tread

This thick layer of rubber provides the interface between the tire and the road. Wear-resistant rubber is

used to protect the carcass and belt against fractures and impacts and to deliver a long driving life.

Shoulder

Located between the tread and sidewall, the shoulder rubber is the thickest so that the design must

allow for the easy diffusion of heat generated within the tire while driving.

Sidewall

The part between the shoulder and bead, the flexible sidewall protects the carcass and enhances the
ride. A tire’s type, size, structure, pattern, manufacturing company, product name and various

characters are indicated here.

Bead

The bead attaches the tire to the rim and wraps the end of the cord fabric. Comprised of the bead wire,

core, flipper and other parts, the bead is generally designed to be slightly tight around the rim so that in

the case of a sudden drop in inflation pressure, the tire will not fall off the rim.

Carcass

As the most important framework of a tire, the entire inner layer of cord fabric is called the carcass. The

carcass acts to support air pressure, vertical load and absorb shocks.

14-14

Tire Unit Indication

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Tire Inflation Pressure (32 psi)

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Proper inflation

pressure

Excessive inflation pressure

Low inflation

pressure

Aspect ratio (%)

= Nominal section height (H) / Nominal section

width (W)

X 100

The contact area between the

ground and tire faces the tread

layer completely. Thus the

driving force and the braking

force are optimized, and the tire

is worn out evenly resulting in

increased life.

The contact area between the

ground and tire is not enough,

so the tire is worn out unevenly

and the tire is vulnerability to

outside influence.

The contact area between the

ground and tire is excessive, so

a lot of heat is generated and

the tire is worn out unevenly

and abnormally.

Tread width

Tread width

Tread width

14-15

4170-09

During driving, the rotating tire repeats deformation and restoring movement in is tread. This happens

when the tire pressure is low in high speed driving.

However, when the wheel rotating speed is fast, the tire is deformed even before it is restored to its

original shape and the trembling wave appears on the tread portion. If this symptom lasts for an

extended period of time, the tire can be blown out in a short period of time.

If the standing wave symptom occurs on the tire, rubber on the tread comes off and eventually the tire

can be blown out which is very dangerous. When driving at high speed, the inflation pressure should be

increased to decrease heat generation due to extension and contraction motion, to decrease

hydroplaning and to prevent standing wave.

To prevent this symptom, it is recommended to increase the tire pressure 10 ~ 30 % higher than the

specified pressure value in high speed driving.

Specified tire inflation pressure

32psi

2. ABNORMAL TIRE SYMPTOM

Standing Wave

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