中EN
TIRE KNOWLEDGE
NO. 1 Regular Tire Inspection
Tires roll tens of thousands to hundreds of thousands of times a day, and damage may occur at any time. Tires constantly receive
deformation impact, and would accidentally suffer puncture, scrap, squeeze, drag, etc. Regular Tire Inspection is one of the most important methods
to avoid abnormal tire wear, discover and eliminate hidden dangers, and ensure the normal operation of vehicles.
Tire Pressure Monitoring
Use qualified tire barometer to monitor tire pressure. Make sure tire pressure keeps between a normal range to prevent the danger of poor air pressure.
Tire Wear Indication
Observe by naked eyes or measure with a tread depth gauge to check the eccentric wear mark of the tire and the irregular wear mark on tires.
Tire Surface Damage Indication
Observe by naked eyes to find out surface damages like tire bulge, nails in tire, etc. Prepare for rejecting, repairing, and replacing.
Tire Tread Depth Indication
Observe by naked eyes or measure the remaining tread depth with a tread depth gauge. When it reaches to limit, the tire performances of braking, drainage,
anti-skid, and buffering are already very low and urge to replace or repair.
(Maximum shelf life of TBR tire: 2mm remaining tread depth marks on tire shoulder and uses TWI / △ to identify.)
NO. 2 Tire Installation Regulation
Choose Right Tires
1 Determine tire size by calculating tire load capacity and speed rating based on the axle load.
2 According to vehicle structure (Tractor, dumper, mixer car, etc.), road condition, and weather condition, choose tire structure (radial tire or regular tire) tire pattern.
Satisfy vehicle passing capacity riding comfort, steering behavior, tire rotation, convenient maintenance, and cost-efficiency.
3 Additional consideration: stable supply source, vehicle management, etc.
Fit Tires On Same Axle
1 Avoid mixing different tire structure.
Radial Tire: the cord plie is arranged at 90 degrees to the direction of travel, bringing more radial deformation and cushioning ability; the hard tire belt decreases circumferential Deformation and makes the length of the rolling circle close to the outer circumference of the tire.
Bias Tire: less radial deformation and cushioning ability; large circumferential deformation makes the length of the rolling circle less than the outer circumference of the tire.
2 Avoid mixing different tire pattern.
Different tire patterns cause uneven wear and tire-pavement adhesion. Inconsistent tread patterns on the left and right tires will break the balance of the car and make the car drift to one side when jammed on the brakes.
3 Avoid mixing different tire ply rating
Lower ply rating tires have less strength and wear out faster. It's also easy to cause the tire to blow out.
4 Avoid mixing different tire size
After inflation, different outer diameters and section widths of tires distribute the load unevenly on the same axle.
5 Avoid mixing different tire brand
Different brands set up their own tire profile size, tread width, pattern shape, and tire/tire belt structure, which bring various influences on tire wear, strength, and deformation.
Directional Tire Installation
If the tires do not rotate in the same direction, uneven wear, pattern cracking, and dropping will happen. Result in wheel side sliding when braking in an emergency stop.
Dual Tires Installation
The space between dual tires is too narrow for radiant heat, while easily stuck stones and crush tires.
NO. 3 Tire Rotation
Based on diverse applications and loads of rotate tires regularly would make the tire wear evenly and extend tire life.
Position Rotate
Change rolling direction; exchange front tire, hanging tire and drive tire; Speedy up the exchange at the beginning of tire wear.
Rotation Cycle
Refer to the “Maintenance Manual” of the vehicle. The average rotation period of new cars is 10,000 km.
After that, rotate the tires every 5,000 km to 10,000 km. If tires are too worn when driving less than 10,000 km, please maintain wheel alignment immediately.
Rotation Method
Rotate tires in same steer axle and same drive axle – cross left and right tires, switch left and right one directional tires;
Exchange left inner and right outer single drive spinning tires, exchange right inner and right left single drive spinning tires; cross and switch left
And right two steering tires; cross and switch left and right double drive spinning tires.
NO. 4 Tire Storage
Avoidance:
Direct sunlight : photooxidative aging cracks the rubber and makes it hard and fragile.
Ozone: accelerate ozone aging.
Acidic and alkaline oil : rubber modification, deformation, and softening, lost its original physical properties.
High temperature: causes thermo-oxidative aging and tire spontaneous combustion.
Humidity: water accumulation inside the tire, the liquid enters the inside of the carcass through the inner liner and rusted tire wire.