Maximizing Tire Life

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Why Should We Perform Regular Tire Pressure Checks?

Tire Pressure will naturally decrease over time.
New tire will decrease 70 kPa (0.7 kgf/cm2) within a month.

Importance of Regular
Tire Pressure Inspection

Dangers of Low Tire Pressure
Abnormal Shoulder Wear On Both Sides
Deformed Sidewalls (Steel Wire Detaches From Rubber)
Sidewalls Easily Broken
Increased Fuel Consumption
Dangers of High Tire Pressure
1. Tire Damage
  • • Decreased buffering capacity and shock resistance leads to more broken steel wires or tire blowouts
  • • Smaller contact area between tire and the ground leads to faster wear, especially in the center, resulting in shorter tire life
  • • Increased skidding
2. Road Damage
  • • High tire pressure without overloading, will damage the road due to the effects of force and counterforce
3. Rim Damage
  • • High tire pressure causes greater vibration which leads to rim damage
4. Vehicle Component Damage
  • • High tire pressure increases vibrations and damages vehicle components, while proper tire pressure has better buffering capacity
When the tire pressure is maintained at 10kg/cm², tire life can be extended by 40%

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Purpose of Tire Rotation
  • 1. Shoulder and bead failure becomes a concern when transporting heavy cargo. Proper tire rotation can extend tire life.
  • 2. Partial Wear at a Fixed Position

Tire Rotation Method

1. First Rotation: perform 2-3 rotations until the tires are completely worn
2. Second Rotation: if possible, rotate tires between different axles for better results
When using dual tires, the inner tires usually bear more weight and absorb more heat from the brake drums.
Key Points of Tire Rotation
  • 1. Change the rolling direction
  • 2. Rotate between front wheels, trailer wheels, and drive axels
  • 3. Tire rotation frequency should be higher during the initial stage of wear
Effects of Tire Rotation
  • 1. Example of a Standard Long Distance Truck Driver

A driver uses 3 test vehicles to perform tire rotation respectively at wear rates of 20%, 40%, and 60%. After analyzing the results, it is concluded that the optimal rotation approach is to have the load between 100-130% with a speed of 80km/h.

     Total Life * Cost/km
Optimal Position 122 84
Fixed Position 100 100

*Includes the extended tire life and cost for 2 tire rotations

2. Example of Overloading

Load: 180-320% 40-50km/h (actual tire life before failure)

 
Actual Tire Life
Wear Rate
Tire Life Index
Rotated Position
49,700km
82%
260%
Fixed Position
19,100km
37%
100%

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1Tire pressure

2Temperature

3Average speed

4Vehicle Load

5Trailer Wheel Position

6Road Conditions

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Retread tire mainly refers to retreading the tire crown.

For the majority of drivers, retread tires save money!
How much money can you actually save?
Let’s do some calculations.

For Example: 12R22.5 16PR PAL525
New Tire Price Index 100
Retreaded Tire Price Index 60*
Tire Casing Sell Price Index 10*
New Tire Mileage and Life Index 100
*Price indices are only provided as examples
For an accurate calculation, please use actual numbers.
Standard Rule

* Retread Cost Index = Retread Price Index - Tire Casing Sell Price Index = 60 – 10 = 50
* Under normal conditions, retreaded Giti tires can reach 80% of the mileage on new tires.
Retreaded Tire Mileage and Life Index = New Tire Mileage and Life Index x 80% = 80

Conclusion: Maximize tire life and reduce operating costs with retreaded tires
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