When replacing the tires will be very few people pay attention, each new addition to the tire wall and model of common identity, but mostly there will be two small colored markers. Usually is a solid red dot and a yellow dot or circle. General users in the purchase of new tires and installed with little notice this detail, and a lot of tire shops do not give customers the easy way to introduce the role of these two points, so many users are overlooked two points there.
Tire wall of color-coded
General solid red dot represents the tire's maximum point of the vertical steel, simply put, is the solid red dot is this tire vibration in the largest lap turning point. Revolution of the tire contact with the ground, in a different perspective to bear when the vibration strength is different, a phenomenon known as RFV (Radial force Variation). When the REV value is too large, the tire will vibrate in the rotation.
So a good test of the product manufacturer will mark the point on the tire's position, but if you find a tire vibration exceeded the factory will not make it. The red dot is only useful for testing and quality inspection departments, and for retailers and end users in the meaningless.
Yellow dot or circle, also known as tap markers, indicating that the site is the lightest on the circumference of the tire of this place. We all know that the wheel is composed of three parts, namely: tires, wheels and valve, because the hub to install the valve, so the wheels on the corresponding valve position usually is the wheel full circle on the most important points, while the wheel of the most important point is the lightest point on the front tire, which is that the position of the yellow dot or circle, then they will play a complementary role, can make the weight on the wheel circumference distribution tends to be more balanced. So, when installing the tire is the right way valve position should be facing the yellow dot or circle. This can be done when the wheel balancing weights to reduce the use.
Optimistic about the identity of tire production date
Because tires are rubber, so we choose not to pay attention to buy tires look brand product price is not "fresh" and also shelf life? Tire Factory is generally three years after the guarantee period, but look at the tire production line, rubber enters the aging period. Some products become commodities after the tire has not been used, looks new, but in fact has been the aging of rubber, so tell the tire production date is a very important issue. We want to know the production date can be found in the tire side of the DOT symbol and the sign of the last four digits of the tire can be that the production of this date, the first two four-digit number that identifies the year in the first few weeks, after two years of production, said, "0810" indicates that this tire is the first eight weeks of 2010 products.
But note that in recent years, some unscrupulous dealers to buy cheap vintage before the "new" tires, the use of the DOT code of professional mold changes after the date of production, just as the factory of their tire sales, earn high the amount of difference. These units also known as "rescheduled child" is actually very simple identification rescheduled tires, in addition to the regular tire shop to buy tires, but also pay attention to the DOT tire identification and production date are smooth, small cracks around the availability, genuine the DOT logo are up in the tire manufacturing and tire when the die as a whole, "rescheduled tires: tire is usually marked on the original logo and the production date of the DOT in that small piece of rubber polishing off or dredged, and then The new logo and affixed DOT production date, no matter how good technology is added, so careful observation, or by hand to pull the pull of this area can easily find flaws.
The correct tire inflation method
Each tire is marked with which the tire air pressure, proper tire pressure value which should be the standard value of 80% - 100% (point to note here is that the tire air pressure should be based on standard tires prevail and you should not drive the vehicle subject to the required pressure value) and when you intend to set at 80% air, and do not hit you directly to the desired pressure value on the stop, the correct inflation is Install the tire pressure should be in charge to which the provisions of tire value of 100% or slightly more than 100%, and then put you in the air pressure required for pressure values. This will make the tire bead and wheel full bite, but also on the tires before you hit the road to do a little test
