# Proper tire pressure for Primewell tires. **URL:** \ **Category:** Miscellaneous and Personal Stuff I Must Share\ **Created:** [June 21, 2014, 4:38am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270 "2014-06-21T04:38:43Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![Little\_Pig](https://avatars.discourse-cdn.com/v4/letter/l/c57346/32.png) [@Little\_Pig](https://boards.straightdope.com/u/Little_Pig)\ **Post date:** [June 21, 2014, 4:38am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270/1 "2014-06-21T04:38:43Z")
I purchased a set of Primewell tires (PS830 185/65 R14 86T) for my car ('99 Corolla). I’ll be damned if I can find the correct tire inflation specs for this tire on The Net (and I usually have strong Google Fu) or on the tire itself. No matter what I search on I either get directed to a site reviewing the tire or a site trying to sell me the tire. WTF?! All I want to know is what the proper tire inflation is supposed to be. Why is this so freaking difficult? ---
**Author:** ![running\_coach](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/running_coach/32/15836_2.png) [@running\_coach](https://boards.straightdope.com/u/running_coach)\ **Post date:** [June 21, 2014, 4:45am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270/2 "2014-06-21T04:45:43Z")
Look on the sidewall. ---
**Author:** ![Darth\_Sensitive](https://avatars.discourse-cdn.com/v4/letter/d/58956e/32.png) [@Darth\_Sensitive](https://boards.straightdope.com/u/Darth_Sensitive)\ **Post date:** [June 21, 2014, 4:51am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270/3 "2014-06-21T04:51:48Z")
Look on the inside of your door? ---
**Author:** ![Rick](https://avatars.discourse-cdn.com/v4/letter/r/9f8e36/32.png) [@Rick](https://boards.straightdope.com/u/Rick)\ **Post date:** [June 21, 2014, 5:13am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270/4 "2014-06-21T05:13:44Z")
30 PSI all around according to this [site.](http://www.drivegreen.com/ATP-%20toyota.htm) ---
**Author:** ![Little\_Pig](https://avatars.discourse-cdn.com/v4/letter/l/c57346/32.png) [@Little\_Pig](https://boards.straightdope.com/u/Little_Pig)\ **Post date:** [June 21, 2014, 5:16am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270/5 "2014-06-21T05:16:15Z")
> [@Rick](#): > > 30 PSI all around according to this [site.](http://www.drivegreen.com/ATP-%20toyota.htm) But Rick, how do I know that the tire adheres to this sites recommendations? ---
**Author:** ![Gatopescado](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/gatopescado/32/5711_2.png) [@Gatopescado](https://boards.straightdope.com/u/Gatopescado)\ **Post date:** [June 21, 2014, 5:20am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270/6 "2014-06-21T05:20:05Z")
42 ---
**Author:** ![PastTense](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/pasttense/32/14550_2.png) [@PastTense](https://boards.straightdope.com/u/PastTense)\ **Post date:** [June 21, 2014, 5:24am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270/7 "2014-06-21T05:24:21Z")
> [@Little\_Pig](#): > > But Rick, how do I know that the tire adheres to this sites recommendations? Are there any modern tires which can’t handle 30 psi? I doubt it. ---
**Author:** ![Little\_Pig](https://avatars.discourse-cdn.com/v4/letter/l/c57346/32.png) [@Little\_Pig](https://boards.straightdope.com/u/Little_Pig)\ **Post date:** [June 21, 2014, 5:31am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270/8 "2014-06-21T05:31:03Z")
> [@PastTense](#): > > Are there any modern tires which can’t handle 30 psi? I doubt it. PastTense. That is not what I am asking. Please see Post # 5. ---
**Author:** ![don\_t\_ask](https://avatars.discourse-cdn.com/v4/letter/d/e68b1a/32.png) [@don\_t\_ask](https://boards.straightdope.com/u/don_t_ask)\ **Post date:** [June 21, 2014, 5:44am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270/9 "2014-06-21T05:44:53Z")
According to Primewell’s website you get the correct pressure from your vehicle: [http://www.primewelltires.ca/en/tire\_guide/tire\_care\_and\_safety/TirePressure.aspx](http://www.primewelltires.ca/en/tire_guide/tire_care_and_safety/TirePressure.aspx) > [@](#): > > The tire’s air pressure standard for each vehicle is set by the vehicle manufacturer and can be found in various areas of your vehicle, such as at the end of the driver’s door, at the bottom of the door or in part in the storage box at the door of the vehicle. In my car it’s inside the flap over the fuel tank. ---
**Author:** ![Rick](https://avatars.discourse-cdn.com/v4/letter/r/9f8e36/32.png) [@Rick](https://boards.straightdope.com/u/Rick)\ **Post date:** [June 21, 2014, 5:45am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270/10 "2014-06-21T05:45:49Z")
> [@Little\_Pig](#): > > But Rick, how do I know that the tire adheres to this sites recommendations? Not sure I understand what you are asking. When it comes to inflation pressures, the car maker makes the specification, not the tire maker. The car maker’s recommended inflation pressure is a cross between the best handling, longest wear and best ride. If you want slightly better handling, inflate the tires to the car maker’s optional pressure (Listed on the tire inflation label usually on the driver’s door jam, the glove box lid, or the fuel filler lid) This will specify a pressure a few lbs higher than the standard pressure. You can have two cars that use the exact same tire and list different pressures. On one car the inflation pressure might be 32F 36R and on the other car the pressures might be 34F and 34R. This is OK. ---
**Author:** ![Little\_Pig](https://avatars.discourse-cdn.com/v4/letter/l/c57346/32.png) [@Little\_Pig](https://boards.straightdope.com/u/Little_Pig)\ **Post date:** [June 21, 2014, 5:48am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270/11 "2014-06-21T05:48:17Z")
> [@don\_t\_ask](#): > > According to Primewell’s website you get the correct pressure from your vehicle: > > [http://www.primewelltires.ca/en/tire\_guide/tire\_care\_and\_safety/TirePressure.aspx](http://www.primewelltires.ca/en/tire_guide/tire_care_and_safety/TirePressure.aspx) > > In my car it’s inside the flap over the fuel tank. So, “don’t ask”, you are saying I do not appeal to the tire manufacturer but rather the auto manufacturer, yes? ---
**Author:** ![don\_t\_ask](https://avatars.discourse-cdn.com/v4/letter/d/e68b1a/32.png) [@don\_t\_ask](https://boards.straightdope.com/u/don_t_ask)\ **Post date:** [June 21, 2014, 5:49am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270/12 "2014-06-21T05:49:57Z")
Yes. [Here](http://www.drivegreen.com/ATP-%20toyota.htm) is a list for all Toyota models. ---
**Author:** ![Santos\_L\_Halper](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/santos_l_halper/32/1_2.png) [@Santos\_L\_Halper](https://boards.straightdope.com/u/Santos_L_Halper)\ **Post date:** [June 21, 2014, 5:51am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270/13 "2014-06-21T05:51:28Z")
Look at the sticker in the door jamb. It’ll indicate the pressure the car manufacturer recommends. The maker of the tire is immaterial. They don’t know the details about what vehicle the tire’s going to be installed on. And definitely don’t pump it up to the pressure indicated on the sidewall of the tire. That’s the maximum the tire is designed to handle. It’s not the tire manufacturer recommending it as the best pressure to run at. ---
**Author:** ![Little\_Pig](https://avatars.discourse-cdn.com/v4/letter/l/c57346/32.png) [@Little\_Pig](https://boards.straightdope.com/u/Little_Pig)\ **Post date:** [June 21, 2014, 5:54am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270/14 "2014-06-21T05:54:05Z")
> [@Santos\_L\_Halper](#): > > Look at the sticker in the door jamb. It’ll indicate the pressure the car manufacturer recommends. The maker of the tire is immaterial. They don’t know the details about what vehicle the tire’s going to be installed on. And definitely don’t pump it up to the pressure indicated on the sidewall of the tire. That’s the maximum the tire is designed to handle. It’s not the tire manufacturer recommending it as the best pressure to run at. AH! Auto manufacturer, not tire manufacturer. :smack: Ignorance defeated. Thanks to all. ---
**Author:** ![48Willys](https://avatars.discourse-cdn.com/v4/letter/4/db5fbb/32.png) [@48Willys](https://boards.straightdope.com/u/48Willys)\ **Post date:** [June 21, 2014, 9:37am UTC](https://boards.straightdope.com/t/proper-tire-pressure-for-primewell-tires/691270/15 "2014-06-21T09:37:58Z")
This information is usually in the owners handbook. Most of my rigs have that in the glovebox.