Pirelli Tyre Marking Identification Guide: Decode Sidewall Codes

Decode every number, letter, and symbol on your Pirelli sidewall — and know exactly what your tyre is telling you.

Most drivers glance at their tyres only when the tread looks worn — but the sidewall is actually a dense label of engineering data. Size, load capacity, speed rating, manufacturing date, and even vehicle-specific homologation codes are all printed right there.

For Pirelli owners, understanding these markings matters even more, since Pirelli often produces vehicle-tuned versions of the same tyre. Getting it wrong can affect safety, handling, warranty claims, and even insurance validity. This guide breaks down every marking you will find on a Pirelli tyre, what it means, and how to use it when buying replacements.

Why Tyre Markings Matter

Tyre markings are more than manufacturing details, they affect how your car drives and how safe it is. The size code shows that the tyre fits the wheel properly and matches the vehicle’s speed and load needs. If the four tyres do not match in size or rating, handling, braking distance, and stability control can all be affected.

They also matter for compliance. Many insurers and regulations expect tyres to meet or exceed the vehicle manufacturer’s original specification, so using the wrong tyres can make a claim harder after an accident. These markings are just as useful when you’re buying part-worn tyres or a used car, because they show the tyre’s real age, its rating, and whether it was made for that vehicle.

Breaking Down the Tyre Size Code

Take a typical code: 225/45 R17 91W. Each segment tells a different story:

225 – Tyre width in millimetres, measured sidewall to sidewall.
45 – Aspect ratio: sidewall height as a percentage of width (here, 45 per cent of 225mm).
R – Construction type; R stands for radial, the standard on nearly all modern cars.
17 – Rim diameter in inches that the tyre is designed to fit.
91 – Load index, a coded number representing the maximum weight the tyre can carry.
W – Speed rating, indicating the maximum speed the tyre is certified for.

Change any one of these values, and you change how the tyre behaves — which is why matching the exact code from your vehicle handbook is non-negotiable.

Pirelli-Specific Markings

Beyond the standard size code, Pirelli tyres carry a model name such as P Zero, Cinturato, or Scorpion. This identifies the tyre family and its intended use, from performance to all-season to SUV-focused tread patterns. What truly sets Pirelli apart, though, is its use of homologation codes: small alphanumeric markings that show a tyre has been custom-tuned for a specific car manufacturer.

★ (Star) – Approved for BMW
MO / MO1 / MOE – Mercedes-Benz approved
N0 through N5 – Successive generations approved for Audi, Porsche, and Lamborghini
AO – Audi-specific approval
J – Jaguar approval
RO1 / RO2 – Ferrari approval

Homologation means the manufacturer worked directly with Pirelli to tune the rubber compound, internal construction, or noise-cancelling foam for that exact car. Fitting a tyre with the wrong (or no) homologation code isn’t inherently dangerous, but it can lead to a less precise ride, altered noise levels, or handling that doesn’t match what the car was engineered for.

Tyre Model	Popular Tyre Sizes	Compatible Cars	Price Range
Pirelli P Zero	255/45 R19, 235/50 R19, 285/40 R23	Porsche Panamera, Audi Q3, Lexus NX200t	₹16,720 – ₹1,38,321
Pirelli Cinturato P7	225/50 R18, 225/55 R17, 225/60 R17	BMW 3 Series, BMW X1, Nissanes/255-45-R19 370Zhttps://www.tyremarket.com/Search/Car-Tyres/255-45-R19	₹7,333 – ₹48,703
Pirelli Scorpion Verde All Season	275/45 R21, 235/55 R19, 255/45 R21	Mercedes-Benz GLE, Audi A8, Tata Hexa	₹11,499 – ₹64,627
Pirelli Scorpion Zero	255/60 R18, 245/45 R20, 285/45 R21	Isuzu mu-X, Mahindra Alturas G4, Maserati Levante	₹22,949 – ₹58,675
Pirelli Cinturato All Season Plus	215/60 R16, 205/55 R16, 225/50 R18	Hyundai Venue, Tata Nexon, Skoda Yeti	₹11,384 – ₹24,149
Pirelli Cinturato P6	215/60 R16, 195/60 R15, 175/65 R14	Honda Accord, Maruti Vitara Brezza, Toyota Camry	₹6,424 – ₹15,415

Manufacturing Date Code (DOT Code)

Every tyre carries a DOT (Department of Transportation) code, usually the final grouping of numbers stamped inside an oval on the sidewall. The last four digits reveal exactly when the tyre was made: the first two digits are the week, and the last two are the year. So, a code ending in 2223 means the tyre was manufactured in week 22 of 2023.

This matters even if the tread still looks healthy, because rubber compounds degrade with age and heat exposure, gradually losing grip and elasticity regardless of mileage. As a general rule of thumb, tyres should be replaced once they cross the 6–10-year mark, even if they were barely used, which is a useful check when buying second-hand vehicles or tyres.

Load Index and Speed Rating Explained

The load index is a two- or three-digit code corresponding to a maximum weight per tyre — for reference, 91 corresponds to roughly 615kg, while 100 corresponds to around 800kg. Speed ratings follow a letter system: S (180 kmph), T (190 kmph), H (210 kmph), V (240 kmph), W (270 kmph), and Y (300 kmph).

Always match or exceed your vehicle manufacturer’s specified load index and speed rating — never downgrade. A lower load index risks tyre failure under normal weight, while a lower speed rating can affect handling stability, void warranty coverage, and, in some regions, create legal liability if it doesn’t match the vehicle’s registered specification.

Additional Symbols and Markings

A few more markings are worth knowing before you buy:

Directional arrows – Indicate the tyre must be mounted to rotate in one specific direction.

“Inside/Outside” – Found on asymmetric tread tyres, showing correct orientation on the wheel.

TWI (Tread Wear Indicators) – Small raised bars in the tread grooves that show when the tyre has worn down to the legal minimum.

M+S or the 3PMSF snowflake symbol – Denotes mud-and-snow or genuine winter-rated performance.

TL vs TT – Tubeless versus tube-type construction.

Run-flat markings – Pirelli identifies run-flat tyres with labels like “Seal Inside” or specific run-flat codes, meaning the tyre can be driven a limited distance after a puncture.

How to Use This Information When Buying Tyres

Before purchasing replacement tyres, pull out your vehicle handbook and confirm the exact size, load index, and speed rating required. If you are replacing an OEM Pirelli tyre on a European performance or luxury car, check for the matching homologation code (star, MO, N-series, and so on) to preserve the tuned ride quality.

Always inspect the DOT code to ensure you are buying genuinely fresh stock, not tyres that have been sitting in a warehouse for years. Finally, purchase only through authorized dealers or reputable platforms — this is the best safeguard against counterfeit tyres or incorrectly labelled stock.

Summing up

The markings on a Pirelli sidewall are far more than decoration — they are a complete roadmap to how the tyre will perform, how long it will last, and whether it truly belongs on your car. Make it a habit to check pressure, tread depth, age, and these markings regularly.

When in doubt about size, rating, or homologation compatibility, consult Pirelli’s official fitment guide or speak with a qualified tyre specialist before you buy.