Tyres Tips

7/28/2019 Tyres Tips

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Tyre Tips

Contents

Main Function What is inside Tire

Understanding of Tire Marking

Additional useful info.

Index Table Tire Care (PART)

Pressure / Pressure - statistics

Alignment

Rotation

2 wheel drive 4 wheel Drive

Tread

Time to change your tires

Closing Statement - END


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Tires Main Functions

Tires perform four important functionswith

the assistance of the air contained within

them:

Support the vehicle chassis off the ground.

Help absorb shocks from the road surface. Help transmit traction and braking forces to the road

surface.

Finally, they help change and maintain the direction of

travel.

Tires are the single most important item you will buy

for your vehicle. They significantly affect the safetyand the handling of your vehicle.


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Tire Tips


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A guide to understanding the

markings on your tires.Check the side wall of your tires and you will finda number similar to this example:215/65 R 15 89H

Tire WidthThe first number (215) represents the tire width.The tire width in the above example is 215 mm.

Height Ratio

The next number (65) represents the tire heightaspect ratio. The height ratio of 65, means thatthe tire section height is 65% of the 215 mmwidth (ie 139.75 mm high).This double-digit figure is often referred to as the"tire series" (eg "65 series tires").

Tire ConstructionThe next expression (R) the construction of thetire. means radial ply

Rim DiameterThe next number (15) represents the rimdiameter expressed in inches In the aboveexample the rim diameter is 15 inches. Load IndexThe next number (89) is the Load Index andrepresents the maximum load the tire isdesigned to carry the Load Index of 89 indicates

a load carrying capacity of 580 kg per tire.

Speed Index

The last letter (H) is the Speed Index andrepresents the maximum speed the tire shouldbe used at Speed Index of "H" indicates the tire

is designed to run at up to 210 km/hr.


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Additional useful tire info.

TIRE AGE - Tires carry a three or four digit age code on the sidewall. 3 Digit code indicating the month and year of manuf. For example 129 means the

tyre was manufactured in December 1999.

4 Digit code identifies the week and year of manuf. The first two figures identifythe week, the second two figures represent the year. For example, 1702"represents the 17th week of 2002

TREAD WEAR is a comparative rating based on the wear rate of the tire when tested under

controlled condition example, a tire graded150 would wear one and a half (1 1/2)times as well as a tire graded 100.

TRACTION- Grades AA, A, B, C represent the tire's ability to stop on wet pavement. A tire marked C will have the

lowest traction performance.

TEMPERATURE Grade A, B, & C

The temperature grades A, B, and C, representing the tire's resistance to thegeneration of heat and its ability to dissipate heat.

Example


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SpeedIndex

km/hr Load

Index

Load per

Tyre (kg)

D 65 75 375

E 70 76 400

F 80 77 412

G 90 78 425

J 100 79 437

K 110 80 450

L 120 81 462

M 130 82 474

N 140 83 487

P 150 84 500Q 160 85 515

R 170 86 530

S 180 87 545

T 190 88 560

U 200 89 580

H 210 91 615

V 240 92 630W 270 93 650

Y 300 94 670

ZR 240+ 95 690

96 710

97 730


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Tire Care (PART)

Pressure Check at least once a Month or at every long

trip. Tire must be checked when they are cold that is

before they have been run no more than 2 km. (A tire can

loose up to half of its air and not appear to be flat).

Under inflation

Results unnecessary tire stress

Cause extreme sidewall flexing resulting in dangerous heat

build-up

Bad handling / Loss of control - accident.

Bad fuel economy. Over inflated

Rough ride

Tire tread wear rapidly

Prone to blow up on hard impact or on contact with sharp object.


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More on tire Pressure - statistics

90% of all vehicles have at least one tire under inflated.

A tire will lose 1 pound of air pressure for every 5C

temperature drop.

Tires breathe, releasing about 1 pound of pressure permonth.

A tire that is 20% under inflated will reduce tire life by

30% & increase fuel consumption by 7%.

A tire that is 30% under inflated will reduce tire life by50%.

A very soft tire will generate enough heat to melt and

explode at high speeds!


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Tire Care (PART) WheelAlignmentAlignment generally refers to

the adjustment of a vehicle's front and rear

suspension parts. Poor wheel alignment causes

Difficult vehicle handling

Accelerate tires wear.

When to check Wheel Alignment You notice different handling of your vehicle

You have hit something (kerb, pot holes etc)

You see a wear pattern developing on the shoulders ofthe tires.

Wheel Balance out of balance wheels causesreduce in drive control. check whenever you feel vibration to the steering.


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Tire Care (PART)

ROTATION Regular rotation of tires help prolong your

tire life by achieving uniform wear. (2 Wheel Drive) It is recommended to rotate your tire every 10000 12000 km. or

as recommended by the vehicle manufacturer.


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Tire Care (PART)

ROTATION Regular rotation of tires help prolong your

tire life by achieving uniform wear. (4 wheel Drive) It is recommended to rotate your tire every 10000 12000 km. or

as recommended by the vehicle manufacturer.

5 Tire Rotation


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Tire Care (PART)

TREAD Advanced and unusual tread wear canreduce the ability of tread to grip the road.

Visually inspect your tire for uneven wear change as

necessary.


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When to change your tires

When the Tread is worn down to 1.6mm You see cord or fabric showing through the tire's

rubber.

The tread or sidewall is cracked, cut deep enough

to show cord or fabric.

The tire has a bulge or split.

The tire has a puncture, cut or other damage that

can't be repaired well because of the size orlocation of the damage.


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Thank You

END

Unfortunately the majority of people purchase

tires based on price instead ofPURPOSE. As inmost cases, you get what you pay for. So think

about how much would you pay for your LIFE,or your Family's.

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