inflation pressure SSANGYONG NEW ACTYON SPORTS 2013 Service Manual

04-12
2) Speedometer Gauge
The speedometer indicates the vehicle speed by calculating the signals from the rear left and rear right
wheel speed sensors through ABS or ESP unit. (For the vehicle without ABS or ESP, the signals are
received from the EMS)
If the speedometer gauge vibrates, stops at a certain range or makes an abnormal noise, there could be
defectives in speedometer. However, these symptoms also could be occured when the tire has
uneven wear, different tire inflation pressures or different tire specifications.
Perform the speedometer test regarding the tolerance as described. However, it is not similar simple
work in field due to lack of measuring conditions such as test equipment and preciseness.
Check the allowable tolerance of the speedometer and operations of the trip odometer by using
a tester.
Check if the speedometer pointer is shaking and the abnormal noise sounds.
Eliminate the hysteresis by tapping the speedometer. 1.
2.
3.

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1. SPECIFICATIONS
2. MAJOR CHANGES
Wheel assembly
16-inches silver 18-inches silver 18-inches hyper silver
PN: 41730-32000 PN: 41730-32200 PN: 41730-32300
- Added 18-inches hyper silver to wheel assembly
- Wheel offset and tire size are identical with existing specifications
Existing specifications New specifications
Description Specification
Tire 16 inch 225/75R 16
18 inch 255/60R 18
Tire inflation pressure Front: 32 psi
Rear: 32 psi (44 psi: when the vehicle is fully laden
with luggage)
Wheel 16 inch 6.5J x 16
18 inch 7.5J x 18
Balance weight 16 inch Inner: Attachment type
Outer: Clip type
18 inch Inner: Attachment type
Outer: Attachment type
Tightening torquse of wheel bolt 127.4 ~ 156.8 Nm

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Symptom Possible Cause
Wear at tread edge
Insufficient tire inflation pressure
or overload
Wear at tread center
Excessive tire inflation pressure
Excessive wear in the outer side of the
tread than in the inner side
Excessive camber or deflection of
knuckle arm
Excessive wear in the inner side of the
tread than in the outer side
Insufficient camber or deflection o
f
knuckle arm
1) Appearance Check
4. INSPECTION
InsideOutside
Inside
Outside
InsideOutside
Inside
Outside

14-8
Measure the dial runout and lateral runout
on both the inboard and outboard rim
flanges. - Tire inflation pressure -
Check the tire inflation pressure by
inspecting the tread width. -
Specified value 2.66 mm
Wheel runout
If wheel runout or tire runout is excessive, it
could result in abnormal wear of the tire.
Measure the runout with a dial gauge. 4.
Measure free radial runout on the tire tread. -
Specified value 2.03 mm
If any measurement exceeds the above
specifications, replace the applicable tires
or wheels -Tire inflation pressure 3.
Specified value 32 psi
Maintaining the specified tire ressure is
essential for comfortable riding, driving
safety, and long tire life. Incorrect inflation
pressures will increase tire wear and will
impair safety, vehicle handling, comfortable
driving and fuel economy. Always make sure
that the tire inflation pressure is correct.
Proper
inflationProper
inflationOver
inflation
Tread width Tread width Tread width

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1. OVERVIEW
A radial tire uses a cord angle of 90 degrees. That is, the cord material runs in a radial or direct line from
one bead to the other across the tread. In addition, a radial tire has a belt overwrap under the tread
surface to provide greater structural stability. The belt overwrap of a radial tire distortion while the radial
structure enables high speed driving.
Tire supports the weight of the vehicle, reduces the impact from the road and at the same time, transmits
<009b008f008c004700970096009e008c00990047009b009600470097009900960097008c0093005300470089009900880092008c004700880095008b0047009a009b008c008c00990047009600950047009b008f008c0047009900960088008b0055004700
70009b004700880093009a00960047008d009c0095008a009b>ions to maintain a vehicle’s
movement. In order to complete such tasks, a tire must be structured to be a resilient vessel of air.
There is wear limit mark on the tire, which protrudes as a strip shape located approximately 1.6 mm from
the groove bottom. This wear limit mark is not seen from the outside so there is additional "▲"
mark on the shoulder to let the driver find the wear mark easily. To measure the tire groove depth,
measure at any point other than the point which has a wear limit mark.
The tire is worn unevenly according to the driver's driving habit, improper servicing, low tire inflation
pressure, changed tire location, etc.

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Structure of Tire ▶
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
<00990090008b008c0055004700680047009b00900099008c02c5009a0047009b00a00097008c00530047009a009000a1008c00530047009a009b0099009c008a009b009c0099008c0053004700970088009b009b008c009900950053004700940088009500
9c008d0088008a009b009c009900900095008e0047008a0096>mpany, 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 ▶
Tire Inflation Pressure (32 psi) ▶
Proper inflation
pressureExcessive 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

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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 pressure32psi
2. ABNORMAL TIRE SYMPTOM
Standing Wave ▶

14-16
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. Hydro Planing ▶
Vehicle speed ≤ 60 km/h
No Hydro planningVehicle speed = 80 km/h
Partial Hydro planningVehicle speed ≥ 100 km/h
Full Hydro planing