this post was submitted on 18 Jul 2024
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Mechanic Advice

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The age old tire pressure question (lemmy.world)
submitted 5 months ago* (last edited 5 months ago) by [email protected] to c/[email protected]
14 comments fedilink hide all child comments
 

2001 Infiniti QX4

Placard on car says 26 psi cold

Tires say 32-49

Rear tire is set to 27 cold

Does this look under-inflated? What’s the lowest I should go?

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[–] [email protected] 1 points 5 months ago (1 children)

The placard on the driver's door frame is what you use.

The tire itself has no relevant information for a driver, only for an installer at a shop mounting the tire.

[–] [email protected] 9 points 5 months ago (1 children)

*as long as the tire is the same size as suggested by the manufacture

[–] [email protected] 6 points 5 months ago

Even if you have a different size than is OE. You only disregard the psi, that is based on gross vehicle weight, if you know what you are doing.

It doesn't matter if you have 265/70r16 and go to a 275/50r20, you still use the same pressure because your car still has the same GVWR.