What does the 4th number on a tire mean?
So if the tire markings indicate P225/45R17 91V, it means that the height of the sidewall is 225 multiplied by 0.55 or 101.25 millimeters. The number 45 means that the height is equal to 45 percent of the width.
What do the markings on tires mean?
The two-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire’s width. The bigger the aspect ratio, the bigger the tire’s sidewall will be.
What are the markings on new tires?
The red dot indicates the tire’s high point. Most of the time, a wheel will also have a dot—either a drilled dot or a sticker to indicate its low point. If you have these marks, you should align the red dot with the mark on the wheel. By doing this, you minimize the vibration caused by the high point of the tire.
What do the 3 numbers on a tire mean?
B: TIRE WIDTH The three-digit number following the letter is the tire’s width (from side to side, looking at the tire head on) in millimeters. This may also be referred to as the section width. In this example, the aspect ratio is 65, meaning the sidewall is 65 percent as high as the tire is wide.
What does the yellow and red dot mean on a tire?
Weight Method If the valve stem is located at the heaviest point on the tire, it will be lined up with a yellow dot on the sidewall. When a red dot is lined up with the valve stem you can assume that the valve is at the tire’s lightest point.
Do all new Tyres have Coloured lines?
All new tyres have visible coloured markings forming a radial band on the tyre. Several of these markings represent destination between the manufacture and the recipient…. Cars like Lexus require specific compounds so the radial markings do indeed allow the process to become visible and act like a bar code.
When do you need to read the tire markings?
When buying a new tire or when we just want to check the parameters and performances of our current vehicle tires, we need to read the tire side markings. The numbers and symbols found on the sidewall of every tire give significant details about their size, performance and manufacturing dates.
What do the markings on the tire sidewall mean?
Markings on the tire sidewall are shorthand for a wealth of information including the load index, speed rating, tire size, construction, and more.
What do the numbers mean on a tire?
The most common and visible marking is the size marking. The symbol for size has the following format: The tire width (255), in millimeters, is the distance measured from sidewall to sidewall. The aspect ratio (60), in percentage, is the ratio between the tire height and width.
What does the E Mark mean on tires?
Introduced by the Economic Commission for Europe (ECE), the tire E mark is now mandatory on all European tires. It also signals that the tire meets certain requirements in terms of sizing, performance and marking. For example E4 enclosed in a circle means that the tire was produced and approved in Netherlands.