page_title: Cold inflation pressure
section_title: See also
hierarchical_section_title: Cold inflation pressure / See also
caption_attribution_description: Deutsch: Mechanische Geräte zur Überprüfung des Reifendrucks
context_page_description: Cold inflation pressure is the inflation pressure of tyres before the car is driven and the tyres warmed up. Recommended cold inflation pressure is displayed on the owner's manual and on the placard attached to the vehicle door edge, pillar, glovebox door or fuel filler flap. 40% of passenger cars have at least one tyre under-inflated by 6 psi or more. Drivers are encouraged to make sure their tyres are adequately inflated, as under inflated tyres can greatly reduce fuel economy, increase emissions, cause increased wear on the edges of the tread surface, and can lead to overheating and premature failure of the tyre. Excessive pressure, on the other hand, may lead to impact-breaks, decreased braking performance, and cause increased wear on the center part of the tread surface.
  Tyre pressure is commonly measured in psi in the imperial and US customary systems, bar, which is deprecated but accepted for use with SI or the kilopascal, which is an SI unit.
  Ambient temperature affects the cold tyre pressure. Cold tyre absolute pressure varies directly with the absolute temperature, measured in kelvin.
context_section_description: Direct TPMS
  Tyre-pressure gauge
  Tire-pressure monitoring system
caption: Tyre pressure measuring instrument
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