SsangYong Korando III (2010 year). Manual - part 561

15-8

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

1) Standing Wave

15-9

4170-00

When the vehicle is driven on a road surface covered with water at high speed, tires do not contact with 

the road surface but rotate floating on a thin film of water.

It causes brake failure, lower traction force and losing the steering performance. 

To prevent this, increase the tire inflation pressure, use tires with leaf shape tread which is not worn. 

However, it is a best measure to drive slowly. 

2) Hydro Planing

15-10

If weight is not equally distributed around the wheel, unbalance centrifugal force by the wheel rotation 

produces vibration. As the centrifugal force is produced proportional to the square of the rotating speed, 

the wheel weight should be balanced even at high speed. There are two types of the tire and wheel 

balancing: static and dynamic. Abnormal vibration may also occur due to unbalanced rigidity or size of 

tires. 

1) Static Balance

When the free rotation of the wheel is 

allowed, the heavier part is stopped on the 

bottom if the wheel weight is unbalanced and 

this is called "Static Unbalance". Also, the 

state at which tire's stop position is not same 

is called "Static Balance" when the wheel is 

rotated again. If the part A is heavier as 

shown in the figure 1, add the balance weight 

of a weight corresponding to unbalanced 

weight from B to A to maintain the static 

balance. If the static balance is not 

maintained, tramping, up and down vibration 

of the wheels, occurs. 

2) Dynamic Balance

The static unbalance of the wheel creates 

the vibration in the vertical direction, but the 

dynamic unbalance creates the vibration in 

the lateral direction. As shown in the figure 

2 (a), if two parts, (2) and (3), are heavier 

when the wheels are under the static 

balance condition, dynamic unbalance is 

created, resulting in shimmy, left and right 

vibration of the wheels, and the torque Fxa 

is applied in the axial direction. To correct 

the dynamic unbalance, add the balance 

weight of a same weight for two points of  

the circumference of the rim, A and B, as 

shown in the figure 2 (b), and apply the 

torque in the opposite direction to the 

torque Fxa to offset in order to ensure 

smooth rotation of the wheel. 

Center

A

B

a

a

Fxa

Fxa

F

F

A

B

(a)

(b)

[Figure 1]

[Figure 2]

3. WHEEL BALANCE

16-3

4012-00

Unit

Construction

Front sub 
frame

Rear sub 
frame 
(4WD)

Rear sub 
frame 
(2WD)

1. SPECIFICATION

Body mounting:

4-points bush

Transaxle mounting:

2-points bush

Weight: 22.37 kg

1.

2.

3.

Body mounting:

4-points bush

Axle mounting:

4-points bush

Weight: 16.61 kg

1.

2.

3.

Body mounting:

40 points direct 

mounting

Spring link:

Direct mounting 

without bracket on 

rear cross member

Weight: 12.74 kg

1.

2.

3.

BRKT-ENG MTG RR

BRKT-ENG MTG FRT