# Trust the Manual or the Door Jam For Air Pressure? **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [August 6, 2024, 8:13pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614 "2024-08-06T20:13:40Z")\ **Posts on this page:** 20\ **Page:** 2
**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\ **Post date:** [August 7, 2024, 4:59pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/21 "2024-08-07T16:59:07Z")
I’m half German but my Acura is part Japanese. The manual has th3 front different than the rear. I don’t know if I’ve ever looked at the label on the car. I like the note to ad 4 psi if driving over 100. ---
**Author:** ![asemaster](https://avatars.discourse-cdn.com/v4/letter/a/5f9b8f/32.png) [@asemaster](https://community.cartalk.com/u/asemaster)\ **Post date:** [August 7, 2024, 7:26pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/22 "2024-08-07T19:26:17Z")
> [@davesmopar](#): > > Who the heck is going to check their gas cap door for the correct tire pressure?? That is German engineering for ya… Might come in handy for @ChrisTheTireWhisperer who checks his tire pressure at every fill up. ---
**Author:** ![riverofwind](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@riverofwind](https://community.cartalk.com/u/riverofwind)\ **Post date:** [August 7, 2024, 7:55pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/23 "2024-08-07T19:55:48Z")
@ChrisTheTireWhisperer Here 'tis. I removed the VIN from the label. ![20240807_120450](https://global.discourse-cdn.com/cartalk/original/3X/f/7/f79d225c815dfad9913bc30194b28185a9d0f957.jpeg) ---
**Author:** ![ChrisTheTireWhisperer](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/christhetirewhisperer/32/34798_2.png) [@ChrisTheTireWhisperer](https://community.cartalk.com/u/ChrisTheTireWhisperer)\ **Post date:** [August 7, 2024, 10:54pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/24 "2024-08-07T22:54:19Z")
So that’s from your Dad’s 2006 330. Can you provide his tire pressure placard, or, provide that certification(gross weights) placard from your red car? Cross out VIN, etc as you wish. I just need the gross axle/vehicle weights ---
**Author:** ![keith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/keith/32/5518_2.png) [@keith](https://community.cartalk.com/u/keith)\ **Post date:** [August 9, 2024, 12:59am UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/25 "2024-08-09T00:59:29Z")
The door jam pressure is correct IF you are using tires that meet the specs of the tires listed on the door jam. Changing to plus size tires or special purpose tires and require a different pressure. Also changing to a different load range can also cause a need for a different pressure, for example going from a “P” tire, load range B to an “LT” tire, load range E can require up to an extra 20 PSI. You can read all about it here. This is a Toyo Tire site, but the information here comes from the organization that sets the standards for all tires. > **[application\_of\_load\_inflation\_tables\_20200723.pdf](https://www.toyotires.com/media/pxcjubjs/application_of_load_inflation_tables_20200723.pdf)** > > 2.18 MB ---
**Author:** ![ChrisTheTireWhisperer](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/christhetirewhisperer/32/34798_2.png) [@ChrisTheTireWhisperer](https://community.cartalk.com/u/ChrisTheTireWhisperer)\ **Post date:** [August 9, 2024, 11:52am UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/26 "2024-08-09T11:52:10Z")
Thank you keith! tirepressure(dot)org also publishes load table in every flavor: P-metric, metric, light truck, etc. I am still having to deal with morons who insist that the door frame tire placard is valid only for the _make_ and _model_ of tire installed on the car at the factory! 🤦‍♂️ I keep telling these fools that as long as what you mentioned: size, load index, and speed rating, still matches, that is good enough. Some car mfgs, particularly of exotic sports cars, may recommend tires made by one or two specific mfgs, but that is by far the exception. ---
**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\ **Post date:** [August 9, 2024, 12:02pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/27 "2024-08-09T12:02:33Z")
> [@ChrisTheTireWhisperer](#): > > I am still having to deal with morons who insist that the door frame tire placard is valid only for the _make_ and _model_ of tire installed on the car at the factory! 🤦‍♂️ I do not remember anyone on this site stating anything remotely like that. Most posters recommend researching tires by need. IE, summer only, snow/ice, summer only, etc. Only one time have I replaced tires with the same make&model as installed at the factory because I liked the performance of those tires. ---
**Author:** ![ChrisTheTireWhisperer](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/christhetirewhisperer/32/34798_2.png) [@ChrisTheTireWhisperer](https://community.cartalk.com/u/ChrisTheTireWhisperer)\ **Post date:** [August 9, 2024, 12:43pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/28 "2024-08-09T12:43:05Z")
> [@Purebred](#): > > I do not remember anyone on this site > stating anything remotely like that. You assume that this is the only automotive forum or newsgroup I frequent. Remind me again, someone, about the perils of assuming? ---
**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:** [August 9, 2024, 2:18pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/29 "2024-08-09T14:18:06Z")
> [@ChrisTheTireWhisperer](#): > > I keep telling these fools that as long as what you mentioned: size, load index, and speed rating, still matches, that is good enough. How does speed rating affect recommended pressure? ---
**Author:** ![glasspilot](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/glasspilot/32/27886_2.png) [@glasspilot](https://community.cartalk.com/u/glasspilot)\ **Post date:** [August 9, 2024, 2:43pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/30 "2024-08-09T14:43:41Z")
You can never be wrong following the tire placard on the drivers door jamb. My 2017 Chevy Volt shows 36 psi. But for the 2018 and 2019 Volts they upped it to 39 psi. I’m a member of a couple Volt messageboards/forums and there’s always a discussion of the best pressure. Most Volt owners go for a higher pressure to gain more efficiency. I run 40 psi and am on my second set of tires. My 1st set wore the treads very evenly so I’m sticking with 40. ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [August 9, 2024, 3:43pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/31 "2024-08-09T15:43:23Z")
> [@ChrisTheTireWhisperer](#): > > I am still having to deal with morons who insist that the door frame tire placard is valid only for the _make_ and _model_ of tire installed on the car at the factory! 🤦‍♂️ Have any of these people asked for your advice or do you just go around annoying people ? ---
**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\ **Post date:** [August 9, 2024, 3:55pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/32 "2024-08-09T15:55:53Z")
Not a matter of assuming, it is a matter of communication. ---
**Author:** ![riverofwind](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@riverofwind](https://community.cartalk.com/u/riverofwind)\ **Post date:** [August 10, 2024, 7:34pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/33 "2024-08-10T19:34:38Z")
@ChrisTheTireWhisperer Here 'tis the other guy: ![car](https://global.discourse-cdn.com/cartalk/original/3X/f/b/fbdfe9275a3131c0b9e5e3595a6b015c3718b2e8.jpeg) ---
**Author:** ![ChrisTheTireWhisperer](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/christhetirewhisperer/32/34798_2.png) [@ChrisTheTireWhisperer](https://community.cartalk.com/u/ChrisTheTireWhisperer)\ **Post date:** [August 10, 2024, 7:57pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/34 "2024-08-10T19:57:31Z")
And finally, what of those myriad tire sizes do you currently have on the car? ---
**Author:** ![riverofwind](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@riverofwind](https://community.cartalk.com/u/riverofwind)\ **Post date:** [August 10, 2024, 11:29pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/35 "2024-08-10T23:29:15Z")
@ChrisTheTireWhisperer both cars or just one? ---
**Author:** ![ChrisTheTireWhisperer](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/christhetirewhisperer/32/34798_2.png) [@ChrisTheTireWhisperer](https://community.cartalk.com/u/ChrisTheTireWhisperer)\ **Post date:** [August 10, 2024, 11:51pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/36 "2024-08-10T23:51:41Z")
The same car, the red 330i. ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [August 11, 2024, 12:29am UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/37 "2024-08-11T00:29:21Z")
> [@ChrisTheTireWhisperer](#): > > And finally, what of those myriad tire sizes do you currently have on the car? The information is in the original post. > [@riverofwind](#): > > My BMW E46 2002 330Ci > [@riverofwind](#): > > front tires are 225/45ZR17 & backs are 245/40R17. ---
**Author:** ![ChrisTheTireWhisperer](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/christhetirewhisperer/32/34798_2.png) [@ChrisTheTireWhisperer](https://community.cartalk.com/u/ChrisTheTireWhisperer)\ **Post date:** [August 11, 2024, 11:58am UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/38 "2024-08-11T11:58:20Z")
Thanks all. I have homework to do now! As an aside: You wonder why I’m so obsessed with tires, pressures, alignments, etc? Yesterday my wife’s 2004 Corolla came back from maintenance and some new brakes at the same dealership she bought the car from 19 years ago. This morning, I checked her tires? 39-40psi all around! Door placard cold spec = 30psi, front and back. 35 I could understand, just covering their butts. But 40?? No f\_\_\_\_ing excuse for such STUPIDITY! Especially if you have ‘ASE’ embroidered into your shop shirts. And I am sure that my wife’s car wasn’t the first nor will be the last one sent out of the bay with tires so overinflated. And if anyone here defends inflating the tires to 45 hot on a car that says 30psi on its door frame, you are just as much an IDIOT. I’m no longer afraid to speak my mind. I’m sick of ignorance, stupidity, laziness, and complete lack of common sense in this RETARDED… 21ST… CENTURY. Go ahead, report this, I don’t care. Some things you just can’t be nice about. ---
**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\ **Post date:** [August 11, 2024, 6:20pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/39 "2024-08-11T18:20:02Z")
Have you ever considered that the mechanics are on to you and fill your tires up just to pull your chain? Every business has customers that they really don’t want back and maybe after 19 years of abuse, they are trying to tell you something? When someone works on my car I always check their work but have never had someone fill my tires up. ---
**Author:** ![ChrisTheTireWhisperer](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/christhetirewhisperer/32/34798_2.png) [@ChrisTheTireWhisperer](https://community.cartalk.com/u/ChrisTheTireWhisperer)\ **Post date:** [August 11, 2024, 8:39pm UTC](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614/40 "2024-08-11T20:39:26Z")
> [@bing](#): > > Have you ever considered that the mechanics are on to you > and fill your tires up just to pull your chain? Every business has > customers that they really don’t want back and maybe after > 19 years of abuse, they are trying to tell you something? First of all, the mechanics at the Toyota dealer have never met me. Secondly, my wife brought her own car in and drove a loner home for the day, then drove the loner back in the afternoon. The tires in that car were equally f\_\_\_ed up: four different pressures. I set them correctly, and she drove the loaner back and said it drove much better. If anyone is “pulling my chain” it is other posters on here! > [@bing](#): > > When someone works on my car I always check their > work but have never had someone fill my tires up. “fill my tires up” what does that mean? We all do that from time to time. You mean the garage you go to never OVER-INFLATEs them? Well, you just must be lucky . Because I’m sure my wife and I are hardly the only people this happens to. It’s simple, folks: Open the drivers door, read the info, set all tires to the pressures listed - plus two psi if its the middle of the day - DONE. It’s a simple step that can have the biggest impact on how a car handles, goes, and stops. A bigger impact, even than upgrading from off-brand tires to a brand everyone recognizes, like Pirelli or Michelin. [Previous page](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614.md?page=1) [Next page](https://community.cartalk.com/t/trust-the-manual-or-the-door-jam-for-air-pressure/195614.md?page=3)