# Tyre pressure

> Tyre pressure is the air pressure inside the tyre, measured in bar or psi; it directly affects grip, braking distance, tyre life and fuel use.

- **Also known as:** Lastik havası, Hava basıncı, Tire pressure, PSI
- **Turkish term:** Lastik basıncı
- **Category:** [Motorcycle Tyres](https://motorsikletparcasi.com/en/category/motorcycle-tyres)
- **Page:** https://motorsikletparcasi.com/en/glossary/tyre-pressure

The correct pressure is in the owner's manual and, on most models, on a label on the swingarm or chain guard; a higher rear value is given for a pillion or luggage. Always measure with **cold** tyres.

- **Too low:** the tyre overheats, the bike wallows in corners and the tyre wears quickly.
- **Too high:** the contact patch shrinks and grip drops.
- 1 bar = 14.5 psi = 100 kPa.

For general values by class and a bar–psi converter, see our [tyre pressure guide](https://motorsikletparcasi.com/en/tools/tire-pressure-guide).

## Related terms

- [Tyre size](https://motorsikletparcasi.com/en/glossary/tyre-size): A tyre size is the code giving tread width (mm), aspect ratio (%) and rim diameter (inches), e.g. 120/70-17.
- [Wheel rim](https://motorsikletparcasi.com/en/glossary/wheel-rim): A wheel rim is the metal hoop the tyre sits on; it is joined to the hub by spokes or cast spokes to form the wheel.

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- Source page: https://motorsikletparcasi.com/en/glossary/tyre-pressure
- Last updated: 2026-10-09
- Türkçe sürüm: https://motorsikletparcasi.com/sozluk/lastik-basinci.md
- Site overview: https://motorsikletparcasi.com/en/llms.txt
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