# Cold inflation pressure vs max psi **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** wrangler, jeep\ **Created:** [February 15, 2010, 9:33pm UTC](https://community.cartalk.com/t/cold-inflation-pressure-vs-max-psi/44542 "2010-02-15T21:33:51Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![labsx1](https://avatars.discourse-cdn.com/v4/letter/l/f08c70/32.png) [@labsx1](https://community.cartalk.com/u/labsx1)\ **Post date:** [February 15, 2010, 9:33pm UTC](https://community.cartalk.com/t/cold-inflation-pressure-vs-max-psi/44542/1 "2010-02-15T21:33:51Z")
hi. I just got 4 firestone Destination AT tires for my 2009 jeep wrangler. Trying to figure out how much air/pressure to put in tires. Tirerack website lists max psi at 44,( P255/75R17), tires say max psi 41 on sidewall, Here & there loads are mentioned, but I never carry heavy loads, just me. Can anyone tell me the range or ideal level of tire inflation psi for THESE tires ? Winter? Summer? I have no info from purchase at all, jeep dealership put on the tires, got them from somewhere else. Thanks ! ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [February 15, 2010, 9:53pm UTC](https://community.cartalk.com/t/cold-inflation-pressure-vs-max-psi/44542/2 "2010-02-15T21:53:45Z")
Don’t go over the # on the side of the tire, but the correct pressure should be on a sticker on the door jamb or elsewhere. Is there no sticker? ---
**Author:** ![labsx1](https://avatars.discourse-cdn.com/v4/letter/l/f08c70/32.png) [@labsx1](https://community.cartalk.com/u/labsx1)\ **Post date:** [February 15, 2010, 10:04pm UTC](https://community.cartalk.com/t/cold-inflation-pressure-vs-max-psi/44542/3 "2010-02-15T22:04:31Z")
no sticker. not tires the car came with. that’s why I am having trouble getting the exact info on ideal inflation pressure, that is, “cold inflation pressure” which after spending some hours on various firestone & other websites, SEEMS TO BE A NATIONAL OR TRADE SECRET ! Tx ---
**Author:** ![tardis](https://avatars.discourse-cdn.com/v4/letter/t/f0a364/32.png) [@tardis](https://community.cartalk.com/u/tardis)\ **Post date:** [February 15, 2010, 10:24pm UTC](https://community.cartalk.com/t/cold-inflation-pressure-vs-max-psi/44542/4 "2010-02-15T22:24:35Z")
The correct pressure doesn’t change just because the tires are different (unless they are way different in size). It’s still the pressure on the door sticker, or in the owner’s manual. If you don’t have an owner’s manual, you may be able to search for one on line. ---
**Author:** ![lion9car](https://avatars.discourse-cdn.com/v4/letter/l/59ef9b/32.png) [@lion9car](https://community.cartalk.com/u/lion9car)\ **Post date:** [February 15, 2010, 10:29pm UTC](https://community.cartalk.com/t/cold-inflation-pressure-vs-max-psi/44542/5 "2010-02-15T22:29:00Z")
When you say these aren’t the tires the car came with, do you mean you’ve gone to a different size from the original tires? If they’re the same size, then the original inflation value still applies. If there’s no sticker, then the information must be in the owner’s manual. ---
**Author:** ![edb1961](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/edb1961/32/122_2.png) [@edb1961](https://community.cartalk.com/u/edb1961)\ **Post date:** [February 15, 2010, 11:41pm UTC](https://community.cartalk.com/t/cold-inflation-pressure-vs-max-psi/44542/6 "2010-02-15T23:41:53Z")
Since P255/75R17 is the standard size for the Wrangler Rubicon call the dealer or Jeep and ask them for the correct tire pressure. There should be a Load/Pressure label on the driver’s side door jamb, especially if it’s a new Jeep. I have Destination LE’s on my 2000 Blazer. The door label suggests 32 psi front/rear, I use 36 psi for better steering response and handling (Max Psi is 44 for these tires). Ed B.