How to Provide Proper Commercial Tire Services Giti’s Recommendation: How To Get The Best Tire Performance
How to select the correct Selection tire size and pattern
Tire Checking tire tread depth Inspection and tire pressure
Casing and retread tire Manage management
Tire How tire pressure affects Pressure tire wear
1. New Tire Life Cycle 2. Retread
Giti robust casing Retread provides a second life
Retread How to select the proper Pattern retread pattern Selection
24 hours Giti Assist - Service Emergency Breakdown Services
1 Table of Content
Valve Page 3
Wheel Fixings Page 5
Tire Pressure Page 7
Tire Balancing Page 9
Tire Rotation Page 11
Retread Page 13
Wheel Alignment Page 15
Tire Basics Page 17
2 VALVE Valve Inspection And Replacement
The O-Ring seal and valve extension must be checked and inspected when a new tire is changed Lock the valve in position. The valve cap is the primary air seal, and must always be fitted correctly Inspect O-Ring seal • If the temperature is high, the O-Ring seal will harden and age.
3 How To Ensure Your Assembly Is Air Tight?
Please remember that the valve, O-Ring seal, and valve caps must always be fitted correctly.
Ensure valve core is correctly seated and tightened Inspect (and if necessary change) the O-Ring seal at the base of the valve stem Tighten the valve extension in line with makers specification
4 WHEEL NUT TIGHTENING For TORQUE Truck Tire Wheel Rims
NUTS AND TORQUE WRENCH USAGE Wrench resistance (lb) Nuts Thread Steel Aluminum Rims Rims 18 35 – 40 20 22 50 – 55 24 70 – 80 14 15 – 20 18 20 – 25 20 30 – 35 22 16 15 – 20 18 25 – 30 55 – 65 20 35 – 40 22 45 – 55 two-pieces 20 - 25 steel rims Use a torque wrench to ensure that the screws are properly fastened. 5 What Is The Correct Wheel Nut Tightening Sequence?
The Correct Locking Sequence Ensures a Safe Ride
Easy to demount Screws are not easily damaged Ensures safety
1 7 6
3 4
5 8 2 6 TIRE PRESSURE
Effect Of Air Pressure On Tire Performance
Under-inflated tyres are one of the biggest causes of using excess fuel. Under-inflated tyres have higher rolling resistance, which means that it takes more effort from the engine to move your vehicle.
7 How To Ensure The Longest Mileage Life Of Giti Tires?
±15psi = -10% mileage
Determine the standard pressure that is suitable for the vehicle’s application and terrain conditions - find out more from Giti TBR Service Centre
Mileage loss If a tire is 20% under-inflated, will cause a 19% loss of tire mileage If a tire is 20% over-inflated, will cause a 22% loss of tire mileage
8 TIRE BALANCING
E.G.315/80R22.5 230 0
20 the weight of 700g 155 160
150 the weight of 500g 110 95 100 100 the weight 68 67 of 300g disturbing force ( kgs ) disturbing force 50 40
Speed (km/h) 50 70 90 110
Higher operation speed causes a greater disturbing force on tire balancing
9 How To Make Driving More Comfortable?
The benefits of a standard balance
Ensures longer tire life Reduces mechanical wear Improves driving comfort Reduces vehicle vibration Reduces light bulb failure 10 TIRE ROTATION
Position Exchange
Weight borne on different positions
(D A Increasing fatigue degree of tire)
11 How To Increase Tire Life By 20%?
Tire Rotation
6.5 5.5 5.5 5.0 5.5 3.5 2.5 1.6
Proper tire rotation can extend tire life by 20%
Due to concerns of damage to the tire shoulder and bead in heavy duty transport, proper tire rotation can extend the service life of tires. In dual tire use, weight on inside tire is relatively big generally - and heat absorbed from brake drum is relatively high, due to less ventilation.
12 RETREAD
Apply New Tread Rubber
GDR 665 GDR 990
13 Maximize Tire Value
High Quality Tyre + Extedable Tyre Life = Lower Cost per Kilometer (CPK)
150/180 Lower Cost Per Kilometer CPK=$0.83
Proper alignment is necessary for even tread wear and precise steering. 1 degree of misalignment will have the mechanical effect of dragging the tire sideways 7 meters for each 1km travelled.
15 How To Maintain The Normal Life Of The Tire?
1° = (Sideways scrub7m for each 1km of forward travel)
Affects On Tire Life
Proper alignment can help avoid irregular tire wear
16 TIRE BASICS
• It is not recommended to use radial tires and bias tires on the same vehicle. If it is necessary to use it in a combination, the radial tires should be limited to the drive axle.
• When the tread patterns are different, the same pattern should be used on the same axle – so the left and right tires must be symmetrical.
17 • The maximum tread depth difference for tires in twinned formation is 2.5mm.
• There must be no tire tread depth less than 1.6mm at any point during driving, as this affects brake safety and may contravene regulation.
• Different brands, different sizes, or different load indexes of tires is not recommended to be mixed on the same vehicle, as this can easily lead to difficulty in vehicle handling.
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