Questionmy question concerns a 2005 jeep grand Cherokee limited 5.7 hemi. currently it has 265/40r22 on it I was wondering what the tire pressure should be for that car?
AnswerJason,
On every vehicle sold in the US, there is a sticker, commonly called the vehicle tire placard, that lists the original tire size and the proper pressure for that size. The vehicle tire placard is usually found on a doorpost or in the glove box, but sometimes it is on the fuel filler door or in the trunk.
According to Tire Guides, a 2005 Jeep Grand Cherokee came with a variety of tire sizes: P235/65R17 inflated to 33 psi, P245/65R17 inflated to 33 psi. Please check the vehicle tire placard to verify this as what comes next is based on this information - and if it is wrong, what follows is wrong as well.
In order to carry the same load a P235/65R17 does at 33 psi, a 265/40R22 needs to use 36 psi, and to carry the same load a P245/65R17 does at 33 psi, a 265/40R22 needs to use 39 psi.
So it depends on what the vehicle tire placard says is the original tire size.
