---
id: "tire_code"
kind: "datatype"
status: "draft"
is_pii: false
categories: ["transport", "industry"]
langs: ["common"]
quality: 80
url: "https://registry.apicrafter.io/datatype/tire_code"
---

# Tyre size code (ISO metric) (`tire_code`)

> **Draft.** Draft records have not been reviewed yet and may be incomplete or wrong; do not treat them as authoritative for legal or compliance decisions.

Size marking on the sidewall of a tyre in the ISO metric system. It has an optional class prefix (P for passenger cars, LT for light trucks), the section width in millimetres, a slash, the aspect ratio in percent, the construction letter (R radial, B bias belt, D diagonal) and the rim diameter in inches. The load index and the speed symbol may follow after a space. Inch-based light truck sizes such as 37X12.5R17LT are not covered.

- Personal data (PII): no
- Categories: Transportation (transport), Industry (industry)
- Countries: global
- Languages: Common to most languages (common)
- Classification: categorical

## Detection

Regular expression (Python `re`):

```
^(?:P|LT)?\d{3}/\d{2,3}[RBD]\d{1,2}(?: \d{2,3}[A-Z]\d?)?$
```

## Examples

- `P195/55R16 85H` — Passenger tyre, 195 mm wide, radial, 16 inch rim, load index 85, speed symbol H
- `195/55R16` — Size without the prefix and the service description
- `37X12.5R17LT` (invalid example) — Light truck size in inches

## Translations

- ru: Маркировка размера шины

## Sources

- wikipedia: <https://en.wikipedia.org/wiki/Tire_code>

## Quality

Score 80/100. Missing: mapping (Wikidata, Schema.org, ...), detector coverage.

JSON: <https://registry.apicrafter.io/api/v1/datatypes/tire_code.json> · Edit: <https://github.com/apicrafter/metacrafter-registry/edit/main/data/datatypes/any/transport/tire_code.yaml>