What do the numbers on the tires mean?

The size of the tire

How do you read… Example of dimensions: 225/55 R 17 97 W

1. 225: in tire sizes, it corresponds to the nominal width of the tire section in mm. …
2. 55: Indicates the series of the tire. …
3. A: This letter indicates the structure of the tire carcass.

What symbol do all-season tires have?

In the all season the denomination bears the acronym 4S which identifies the rubber as 4 seasons. Symbol: In addition to the wording 4S, another identifying mark of the 4 seasons is the initials Mud + Snow (mud and snow) which certifies the use of rubber in the winter seasons.

How to tell if the tires are top quality?

The specific measures are indicated in the shoulder of the rubber that must be well known before proceeding with the purchase. For example, if we consider tires with the abbreviation 225/55 R 17 97 W, this will indicate width, height, rim size and load index.

What is a tire load index?

THE LOAD INDEX – After measuring the rim, there is a number that corresponds to the load index, that is the maximum weight that each wheel can bear, which multiplied by four will obviously be much greater than the total weight of the car divided by have an adequate safety margin.

What does 82t mean on tires?

195 – tire width expressed in millimeters. … 15 – keying diameter, i.e. rim diameter, is indicated in inches. 82 T – load index of the value of 82 and class T speed index (the meaning of the indices is given below).

How to read Michelin tires?

How do you read the size of the circles?

How to calculate the diameter of a car wheel?

If necessary, it is also possible to convert millimeters into inches with regard to the diameter of the wheel rim. Just multiply the millimeters by 24.4. To give a practical example, a tire bearing the indications 195/50 R 15 will have c = 195 mm; s = 50; d = 15 ″ * 25.4 = 381 mm.

What does 205 55 r16 91H mean?

It is necessary to know that the 205 represents the width of the tire in mm, while the number 55 indicates the ratio between the height and the width of the tire cover, expressed as a percentage. … Finally, the number 16 indicates the diameter of the rim on which the tire can be installed, measured in inches.

What does 93v mean?

93: the number 93 indicates the maximum load index of the tire. … Regarding the load index, you can choose a value equal to or greater than that indicated by the tire load must cover the total axle load of your vehicle. W: is the speed index.

What does 94 h mean for gome?

indicates the maximum speed at which the tire can travel!

What does 88t mean on tires?

In this case, a tire with a load index of 88 can support a weight of 560 kg (see table); T specifies the speed index (GSY) that is the maximum speed at which the tire can travel. In this case it is equivalent to 190 Km / h (see table); PR 10 determines the number of canvases with which it is formed.

What does 91H mean on tires?

91H is the code used to express the load index and the speed index: the number – 91 – refers to the load index, while the letter – H – symbolizes the speed index. These are very important parameters, to be known especially when purchasing new tires.

What does 91T mean on tires?

If the load index of the tire is 91T, this means that the load on this tire cannot exceed 615kg.

What does 99h tires mean?

H: corresponds to the speed index. It is typically a letter or letter followed by a number and indicates the maximum speed at which a tire can travel.

How can you tell if a rubber is second choice?

Let’s take a concrete example with a well-known brand of tires: Michelin: the brand is placed on premium, first-choice models; Kleber and BFGoodrich: brand owned by Michelin, destined for second choice; Riken, Tigar and Kormoran: other brands also owned by Michelin, for the third choice.

When is a tire old?

OPTIMUM TIRE LIFE

According to the tire manufacturer, the useful life of a tire is 6 years from the production date indicated by the DOT (10 years is the recommended one). It is not so much the DOT code that matters, but the aging of the tires that only begins when they are used on the road.

When does a tire get old?

The European Technical Organization for Tires and Rims (ETRTO) has established that tires can be considered new for up to 5 years from the date of manufacture. … On the other hand, rubber sold as new can be used for at least 5-6 years, taking the life cycle of a tire to over 10 years.

When are all-season tires worthwhile?

4-SEASON TIRES: WHEN

THEY ARE CONVENIENT 4-season tires are convenient when the mileage that is traveled is not excessive: we are talking about 10-15 thousand km per year, a distance that allows the tire to remain in good condition for a long time.

How many km can you do with all-season tires?

Always taking into consideration variables such as: type of route, weather conditions, driving style and tire size, the average duration of a 4-season tire is about 30,000 kilometers.

What are the best all season tires?