2012 SSANGYONG NEW ACTYON SPORTS inflation pressure

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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 th
e
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. APPEARANCE OF WHEEL
16 inch: 215/65R 16 18 inch: 225/55R 18
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 of knuckle arm
1) Appearance Check
4. INSPECTION
InsideOutside
Inside
Outside
InsideOutside
Inside
Outside

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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 the power to propel, brake and steer on the road. It also functions to maintain a
<009d008c008f0090008a0093008c02c5009a004700940096009d008c0094008c0095009b0055004700700095004700960099008b008c00990047009b00960047008a0096009400970093008c009b008c0047009a009c008a008f0047009b0088009a009200
9a0053004700880047009b00900099008c00470094009c009a>t 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 ride. A tire’s ty
pe, 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.

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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 ▶