Knowing the Meaning of Writing and Symbols In Motorcycle Tires

At the moment we will replace the tires of vehicles, usually we just say the size of tire that we will change or buy, ie the size of 2.75-17 or 100/90-18. Because the parameter that indicates the size of the width, thickness and diameter, but in fact there are many codes and symbols that bikers should know in order to get a tire that meets the specifications chill and know the safe limits for consumption.

We see from the most common standard used for a tire.

Tire Size
Tire size usually use the metric system (metric system) or system-inch (inch system). As an illustrative example tire has a code: 100/90-18, and 2.50-17
how to read it?

100/90-18 tire uses the metric system mean the first number is the size of tire width, the second number after the slash (/) adalan ratio in percent between the width and height of the tire and the third digit after the sign - is the diameter of the rim / wheel. So the size of the tires with 100/90-18 if the translated code is 100 mm tire width, height, tires 90% x 100 = 90 mm and diameter of the tire or wheel size / rim 18 inches.

Tires 2.50-17 inch system so the size is the width of 2.5-inch tires, if converted to mm, 1 inch = 2:54 a 63.4 mm tire width, height of the tire because the second number after the slash is not considered the ratio is 100% so high 2:50 and diameter in inches tire or rim size 17 inch / 17 inch rim.

Age Production
In one side of the tire usually printed four-digit code that indicates when the tire is produced. For example, the 2108 figures can be read the first two digits indicate the week, the last two digit year of manufacture. So the code above is a tire produced in week-21 in 2008. Code production age to note how long the tires can be stored, who fear that affect the performance of the tire itself

Front or Rear Tire Code
To code the use of the front tires or rear tires usually are written with the letter (alphabet) code "F" means front tire to front tire while "R" rear tire to rear tire. Usually there are differences in the form of development / pattern front and rear tires due to the different functions for the front tires as the wheel and if the rain should be able to drain the water so the front tires usually have a flow of water. While the rear tires to drive the function requires a large torque so that the traction is needed so the rear tires usually larger size and has no water flow.
But sometimes we also like to see the rear tires have water flow only the larger size difference alone.

Maximum speed code
Maximum speed of code written by the code letter, which indicates the limit
maximum of a tire driven on for 1 hour with a load according to standard specifications.

Table Maximum speed (km/h)

Case in point : Honda Beat scooter tire brands Federal code 80/90-14 M / C 40P. The letter P that is behind the number (40P) showed that the maximum speed. Appropriate table above shows P is the maximum speed of 150 km / hour.

The Code Used Compound
Compound Code tire letter written in code, which indicates that the tire compound has a soft to hard. Code "S" indicates soft soft compound, "M" indicates medium compound medium and "H" hard means hard tire compound. Selection of tire compound depending on the needs for example for the road race which usually use a soft compound tire with a softer compound is soft and sticky stick to the asphalt, but because it is soft then the tire will quickly run out. While the medium is usually used for day to day. If a tire brand Batllax with code BT 92 F Radial 120/70 R17 M / C 54H, code M / C that's what tire compound showed moderate.

The Direction of Tire Rotation
Direction of rotation or tire rotation is shown by an arrow (Arrow), installation of tires must be in accordance with the direction of the arrow for the direction this development will be the perfect tires stick to the asphalt, or pouring water on wet roads as well as
get good traction. If the installation of inverted tire will not stick to the road and less well traksinya so the tires feels more slippery which could endanger the rider.

Maximum Load Tires
Indication of the maximum load that can be retained by the tire in a cold state
usually included in Diding tires. There have written direct bebanya also are using index numbers.
Written direct written eg Max. Load 212 kg (467 LBS) AT 280 KPa (41 psi) Cold can be read: the tire to hold the maximum load 212 kg or 467 lbs with a maximum wind pressure of 41 psi in cold conditions (vehicle not used)

Using index numbers :
(73W) V280 73 numbers are index numbers that have a standard maximum load 365 kg. 
Table below the maximum load index (kg).
• 30 = 106, 31 = 109, 32 = 112.33 = 115, 34 = 118, 35 = 121, 36 = 125, 37 = 128, 38 = 132, .39 = 136
• 40 = 140, 41 = 145, 42 = 150, 43 = 155, 44 = 160, 45 = 165, 46 = 170, 47 = 175, 48 = 180, 49 = 185
• 50 = 190, 51 = 195, 52 = 200, 53 = 206, 54 = 212, 55 = 218, 56 = 224, 57 = 230, 58 = 236, 59 = 243

Type of Tire
On the side of the tire wall is usually also included these types of tires such as TT = Tube Type or TL = tubeless. Tube-type tire means the tire using tire inner tube, medium or radial tubeless tires are not needed in again.

Symbol Triangle
Triangle symbol is called Thread Indication (TWI) or limit the use of indicators.
Picture a triangle on the side of the tire wall is the final limit of tire grip or plot, if plot tires have been eroded or thin sdudah because the use of the tire should be replaced because it was not safe anymore.

Symbol Color Line
The symbol of this color line is the layer of development that has not been used to indicate the tire was new. Because the outer layer of these tires on the development / pattern so if the old tires will wear out. Color line there is one but there are also more than one color, and each manufacturer usually has a different color eg white, red, yellow, blue and green.

Symbols Balance
Symbols balance is usually in the form of dots on the tire wall, mark a round with different colors for each manufacturer eg yellow, red or blue. Signs of this balance must be considered when setting up the tires, because the lightest itulan point of each tire, at that point also the position of valve must be parallel. Because the tire valve is a heavy point of the tire.

Tire Structure
Not all manufacturers specify tire tire structure, but for good-quality tire manufacturers usually include them. For example: Tread: 4 nylon, side wall: 2 nylon.
Tread tire tread is the part that directly intersect with the asphalt, must be strong against impact, which can damage the tire puncture. provide power sticks to the asphalt and tire durability due to friction. So Tread tire comprises four layers of nylon.
Side wall is the wall of the left and right side tires. Functioning as a crutch ban.Jadi tire side wall is composed of 2 layers of nylon.


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