Tire markings: complete explanation of symbols with table and examples

Have you ever stood in front of a shelf of tires in a store and felt like you were standing in front of a cipher from an ancient civilization? Letters, numbers, pictograms - all this seems like a meaningless set of symbols if you don’t know their meaning. Meanwhile, tire marking contains all the necessary information about the tire: from its size to maximum loads. A mistake in choice can cost not only money, but also safety on the road.

In this article we will look at each designation on the sidewall of the tire - from standard parameters like 195/65 R15 to little-known symbols that manufacturers apply for specialists. You will learn how to determine production date, what do the speed and load indices mean, and why winter tires are marked with a snowflake, and not just the inscription “Winter”. At the end of the article - interactive table with a decoding of all parameters, which can be saved or printed.

1. Basic designations: tire dimensions and design

The most noticeable part of the marking is tire size, which usually looks like a combination of numbers and letters, for example, 205/55 R16 91V. Let's look at this "code" piece by piece:

• 📏 205 — tire profile width in millimeters. This is the distance between the outer sides of the sidewalls pumped up tires (excluding protective belts or letters).
• 📉 55 — profile height as a percentage of the width. In our example, this is 55% of 205 mm. The lower this number, the “lower” the tire (these are called low-profile).
• ⭕ R - designation of radial cord construction (the most common type). Less common D (diagonal) or B (belted diagonal).
• 🔢 16 - the diameter of the rim (disk) in inches for which the tire is designed. This is the only parameter that must exactly match the diameter of your rim - an error here will lead to the impossibility of installing the tire.

After these basic parameters come load and speed indices (in the example - 91V). We'll talk about them in the next section. In the meantime, remember: if you see the inscription LT before the size (for example, LT235/75 R15), this is a tire for light trucks (Light Truck) with reinforced structure. These tires are not suitable for passenger cars!

2. Load and speed indices: what do the numbers and letters mean?

After the tire size, you will definitely see a combination of a number and a letter - for example, 91T or 102H. This load and speed indices, and cannot be ignored: they determine whether the tire can support the weight of your vehicle and whether it is safe at high speeds.

• 🚗 Load Index (number) shows maximum weightwhich one tire can withstand at maximum pressure. For example, index 91 corresponds to 615 kg per wheel. For a passenger car, indexes from 80 (450 kg) up to 100 (800 kg).
• 💨 Speed index (letter) indicates maximum permissible speed, at which the tire retains its properties. For example, T — up to 190 km/h, H - up to 210 km/h, and W - up to 270 km/h.

Important: these indexes do not mean that the tire is designed for constant driving at maximum speeds. They show safety margin in emergency situations. For example, if your car accelerates to 200 km/h, choose tires with an index of at least H (210 km/h), even if you usually drive slower.

⚠️ Attention: If the tire indicates 91T, but you plan to drive faster than 190 km/h, this tire is not suitable! Exceeding the speed index leads to overheating of the rubber and the risk of explosion.

Speed index	Max. speed (km/h)	Typical Application
L	120	Special equipment, trailers
T	190	Budget tires for city cars
H	210	Universal tires for most passenger cars
V	240	Sports and premium cars
W	270	Supercars and racing cars

3. Seasonality and specialized designations

In addition to dimensions and indices, the tire must have markings indicating its seasonality and special properties. Here's what they mean:

• ❄️ Winter tires:
  • Snowflake against the background of a mountain (⛷️) — certified winter tire (mandatory for countries with winter regulations, such as Russia).
  • Inscription M+S (Mud + Snow) - tire for mud and snow, but not always certified like winter (can be all-season).
  • Inscription Winter or Snow - a clear indication of a winter destination.
• ☀️ Summer tires:
  • Missing snowflake and inscription M+S.
  • Sometimes there is an inscription Summer or Road.
• 🌍 All-season tires:
  • Inscription All Season, Any Weather or 4Season.
  • They may have a snow flake (if winter certified) but are usually inferior in performance to dedicated tires.

Also on the bus there may be additional designations, indicating special properties:

• 💧 Aqua, Rain or Wet Grip — improved properties on wet roads.
• 🔇 Silent or Comfort - reduced noise level.
• ⚡ RunFlat (or RFT, SSR) - a tire with reinforced sidewalls, allowing you to drive on a punctured wheel (usually up to 80 km at speeds up to 80 km/h).
• 🔄 Rotation and arrow - directional tire (important to consider during installation!).

⚠️ Attention: If there is an inscription on the tire Tubeless (tubeless), it can be installed without a camera. If it is written Tube Type, you definitely need a tube - otherwise the tire will not hold pressure.

What does "Reinforced" or "XL" mean?

This is a designation for a reinforced tire (Extra Load), which can withstand 20-30% more load than a standard tire of the same size. Such tires are often installed on minibuses or cars with increased load capacity.

4. Date of manufacture: how to determine the age of a tire

One of the most important but often ignored parameters is tire production date. Even if a tire has never been used, over time the rubber loses its elasticity and becomes dangerous. Finding the date is easy: look for an oval stamp with four numbers on the side - for example, 2523.

Explanation:

• First two digits - week of production (in the example - the 25th week, that is, the end of June).
• Last two digits — year (in the example — 2023).

Thus, 2523 means the tire was made in June 2023.

How many years can you drive on tires?

• 🆕 0–3 years — optimal age, rubber retains all properties.
• ⚠️ 3–5 years - Regular inspection for cracks and wear is required.
• ❌ More than 5 years - even if the tread is normal, the rubber becomes hard and loses grip. According to the rules of the EU and the Russian Federation, tires older than 5 years cannot be installed on the front axle, and tires older than 10 years are prohibited from use at all.

5. Tread: depth, pattern and wear indicators

The tread is the “pattern” on the working surface of the tire, which is responsible for grip on the road. Its parameters are also marked on the sidewall:

• 📊 Tread depth for new tires:
  • Summer: usually 7–8 mm.
  • Winter: 9–10 mm (deeper grooves for snow).
• 🚦 Wear indicators — small protrusions in the tread grooves (usually 6–8 pieces around the circumference). When the tread wears down to their level, the tire must be replaced. Look for the icon on the side TWI (Tread Wear Indicator) - it indicates where to look for indicators.
• 🌀 Pattern type:
  • Symmetrical - symmetrical (the most versatile and budget-friendly).
  • Asymmetrical — asymmetrical (the outer and inner sides are different; requires correct installation).
  • Directional — directional (herringbone pattern, requires strict adherence to the direction of rotation).

Minimum permissible tread depth by law:

• 🚗 Passenger cars (summer tires): 1.6 mm.
• ❄️ Passenger cars (winter tires): 4 mm.
• 🚛 Trucks: 1 mm.
• 🏍️ Motorcycles: 0.8 mm.

But! In practice, driving on tires worn to the minimum is dangerous - the braking distance increases by 1.5–2 times!

6. Additional markings: what manufacturers are hiding

In addition to the standard designations, on the tire you can find additional markings, which talk about production technologies, the country of origin and even... about what market the tire is intended for!

• 🏭 Country of origin:
  • Made in Germany, Made in France - European production (often of the highest quality).
  • Made in Russia, Made in China — can be either a budget or a premium segment (depending on the brand).
• 🔬 Technologies:
  • Silica — silicon is used in the rubber composition for better grip on wet roads.
  • 3D ActiveGrip (y Michelin) - Velcro technology for winter tires.
  • BlackChili (y Continental) - a special rubber composition for sports tires.
• 🌐 Market adaptation:
  • N0, N1, N2 etc. (y Pirelli) - tires designed for specific car models (for example, N0 for Porsche).
  • MO (y Michelin) - original tires for Mercedes-Benz.
  • AO (y Audi) - approved Audi for your models.

Also on the tire you can find color marks - small colored dots or triangles on the sidewall. They do not carry information for the consumer, but are needed for installation:

• 🔴 Red dot - the heaviest part of the tire (during installation it is aligned with the mark L on the disk for balancing).
• 🟡 Yellow dot — the easiest place (combined with the nipple for balancing).
• ⚪ White stamp with numbers — internal plant markings (for example, batch number).

7. How to read American markings (P-Metric, LT-Metric, Euro-Metric)

If you buy tires in the USA or see symbols like P215/65R16, this American labeling standard, which is slightly different from the European one. Let's look at the nuances:

• 🅿️ Letter P at the beginning (for example, P205/55R16) - tire for passenger cars (Passenger). An analogue of the European designation without the letter.
• 🚛 Letters LT at the beginning (for example, LT235/75R15) - tire for light trucks (Light Truck). These tires have a reinforced cord and can withstand heavy loads.
• 🔢 Letters XL or Reinforced - reinforced tire (analogous to European XL).
• 📏 No letter before the size (for example, 205/55R16) is Euro-Metric, a European standard that is often used in the United States for all-purpose tires.

An important difference between American tires: they can have double marking of load index - for example, 91/89T. This means:

• 91 — load index for single wheel installation.
• 89 — load index for double installations (for example, on trucks).

⚠️ Attention: American tires with markings LT often have a stiffer sidewall, which can impair comfort in a passenger car. Check to see if they are approved by your car manufacturer before purchasing.

8. How to check a tire before buying: checklist

Now that you know how to read the labels, the most important thing remains - choose and check the tire correctly before purchasing. Here is a step-by-step algorithm:

1. Check the size with the car manufacturer's recommendations (located on a sticker in the doorway or in the instructions). Minor deviations in width/profile are allowed, but The diameter must match exactly.
2. Check the production date - do not take tires older than 3 years, even if they are new.
3. Inspect for defects:
   • Cracks on the sidewall (a sign of aging rubber).
   • Swellings or “hernias” (a sign of cord damage).
   • Uneven tread wear (may indicate improper storage).
4. Make sure you have certificates:
   • For winter tires - snowflake ❄️ (if required by law).
   • For the European market - a sign E with a number (for example, E4 02-1234).

Check disc compatibility:

• If the rim is stamped, make sure the tire does not require casting (Only for Alloy Wheels).
• For RunFlat Tires require special rims (check with your dealer).

Feel free to ask the seller to show certificate of conformity - According to the law of the Russian Federation, all tires must have it. If they refuse, this is a reason to be wary.

💡

Buy tires only from trusted stores with a guarantee. Counterfeits of well-known brands (for example, Michelin or Continental) are often indistinguishable in appearance, but are made of low-quality rubber and can be destroyed at speed.

FAQ: Frequently asked questions about tire markings

🔍 What does the word “Outside” or “Inside” mean on a tire?

This is the designation for asymmetric tires. Inscription Outside should be on the outside of the car, and Inside - from the inside. If installed incorrectly, water drainage and adhesion will be impaired.

❓ Is it possible to install tires with different speed indexes?

Technically possible, but not recommended. If there are tires with different indices on the same axle, this worsens handling. The best option is all four tires with the same indexes. If you have to combine, install tires with higher index to the front axle.

📅 How to determine that a tire is old if there is no production date?

If the date is erased or unreadable, please note:

• Rubber color - old rubber becomes dull and becomes covered with microcracks.
• Smell – Old tires smell like “rubber dust.”
• Marking - until 2000, the date was indicated in 3 digits (for example, 128 - 12th week of the 8th year, that is, 1998).

It is better not to buy such tires!

🚘 Is it possible to install winter tires only on the drive axle?

No! According to the rules of the Russian Federation (clause 5.5 of Appendix 8 to the Technical Regulations) It is prohibited to install tires with studs or winter non-studded tires on only one axle. Violation faces a fine of 500 rubles, but the main thing is extremely dangerous: The car becomes uncontrollable when cornering.

🔄 What to do if there is no rotation direction marking on the tire?

If there is no arrow on the tire Rotation or inscriptions Direction, this symmetrical bus — it can be placed in any direction. However, it is better to install even symmetrical tires so that the inscription on the sidewall is readable from the outside (this will facilitate visual inspection).