How to read the specifications on automobile tires

When replacing new tires , users often only interested in tire size , manufacturer , cost but little attention to the specifications on automotive tires fit their needs using No. So had many incidents involving explosive tire when running at high speed or tires too noisy , prone to " stone cutting " ... This does not only affect the safety of operations and cause loss of no small matter ... here are key parameters of tire that users need to pay more attention when buying tires .

The technical specifications of tires are clearly printed on the tire as : Manufacturer , tire size parameters , the parameters of speed, heavy load of tires , expiry (in weeks in the year )

                              In the image above we read the figures P185 / 75R14 82S

P - Type of vehicle: The first letter tells us that cars can use this tire. P "Passenger": tires for passenger cars may "passenger". There are also some other types as LT "Light Truck": trucks, pickup trucks; T "Temporary": temporary replacement tires.

185 - Tire width: The width of the tire's contact surface of the tire with the road. Tire width is measured from the wall to the other wall (mm).

75 - The ratio of the height of the tire (sidewall) tire surface width is calculated by the ratio of thickness / width tires. In the example above, the thickness of a width equal to 75% (185)

R - The structure of the tire: The tire common on most cars are structured corresponding Radial-letter R. In addition, the tires also have other places as B, D, or E, but now very rare on the market school.

14 - diameter wheels: For each type of tire only use only one size wheels. The number 14 corresponds to the diameter wheels are fitted as 14 inches.

 82S - The load and speed limit: If the number is smaller than the load and vehicle speed is the cause of burst tires * No. 82 - Load tires withstand: Normally this position number from 75 to 105 equivalent from 380 to load 925 kg.

Table corresponding load tires:

* S - The maximum speed the tire can operate normally : In addition to the load index is an alphabetical limit the maximum speed that the tire can operate normally , with the letter S , the tires will have the maximum speed is 180 km respectively / h .

The maximum speed of the tire can be found in the table :

Expiry of automobile tires

 On the tires always have one sequence number. For the last 4 digits only date that produces tires. For example, if the last 4 digits range is 1404, which means this tire factory in the 14th week of 2004. The duration of use of the manufacturer's recommended not exceeding 6 years from the manufacturing date. One tires too "land" is often blurred sequence, whether on the surface, it seems like there is no problem at all. Once the shelf means that the tire has lost all inherent features. Manufacturers have anticipated this and recommended that the tire including no use but only treasured but has expired is deemed to have end of life.

In this case the tire was produced in the 8th week of 2006 

Treadwear the parameters of tire wear tendon with a yardstick is 100 . 

Note: The level of tire wear resistance applies only to compare products from the same manufacturer and not worth comparing different manufacturers . 

More Than 100 - Better 

100 - The benchmark Under 

100 - Less than 

Traction is a measure of the ability of the tire stop straight direction , on slippery road surfaces . 

AA is the highest grade 

A - Best

 B - Medium 

C - Acceptable 

Temperature measurement temperature resistance of tires when driving over long distances at high speed , underinflation or overloading .

 A - Best

 B - Medium 

C - Acceptable 

M + S : means the tire has minimum requirements when walking on muddy or snowy roads . 

Maximum load: the maximum weight that the tire can withstand , calculated in pounds or kilograms . 

Maximum Inflation Pressure : calculated in psi ( pounds per square inch ) or kPa ( kilopscal ) . Never pump the tire pass parameters specified maximum inflation pressure . 

Above is how to read the specifications on automobile tires . If mastered this information , you will have the ability to recognize and smarter decisions to protect your car .