Correct OEM tire pressure 265/30/ZR19

[Azkyrie6]

Went to check my tire pressure this morning and all tire pressures were 30-32psi.

opened the user manual and it recommends
Front: 41PSI, (280kPa)
Rear: 33psi (230kPa)

I reinstated to users manual recommendations. Not used to see front tires this much more inflated is this correct? What has everyone else done?

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[Integra23]

Looks like I need to bump up my tire pressure for my daily commute sustained speeds.

 

[slo_its]

I'm a bit confused by this. The sticker on driver side door frame says 35/33.

This says to avoid high pressure due to heat when driving at over 210km/h sustained, set the front tires higher? Wouldn't heat cause the front tires to rech nearly 50psi?

Unless what it's saying is that higher pressure results in less friction at high speeds thus reducing high temperatures. This could be possible. They're just trying to make sure tires don't overheat as opposed to making better contact.

Unless you're driving on the Autobahn in Germany, which would necessitate importing this car there, you probably won't need this.

 

[Azkyrie6]

I'm a bit confused by this. The sticker on driver side door frame says 35/33.

This says to avoid high pressure due to heat when driving at over 210km/h sustained, set the front tires higher? Wouldn't heat cause the front tires to rech nearly 50psi?

Unless what it's saying is that higher pressure results in less friction at high speeds thus reducing high temperatures. This could be possible. They're just trying to make sure tires don't overheat as opposed to making better contact.

Unless you're driving on the Autobahn in Germany, which would necessitate importing this car there, you probably won't need this.

yes you are correct the doorjamb sticker does say:
Front: 35psi
Rear: 33psi
Max load: 680 lbs. (Although stock tires are something like 1400 lbs each)

I had not checked tire pressures since delivery and was surprised front tires were 30psi. Opened the user manual and it lists F:41PSI R:33psi for sustained high driving speeds.

I’ll almost never go 130mph but I do a fair amount of highway driving. So it seems Acura I’d recommending higher front pressure for higher speeds.
I thought lowering the tire pressure reduces the speed the tire reacts to input. what might be happening is that lowering the pressure is causing the rear to not react fast enough, overshoots, resulting in oversteer.

FWD cars traditionally prone to understeer, so a 2-3 psi higher front pressure than rear, to bias the front to hold its line agrees with the doorjamb sticker.

lower tire pressure generally gives more grip but in corners the tires can be “squishy” which means slower and less responsive handling. I’ll try driving and then lower psi’s down to 35psi/33psi to see how it feels.

 

[Lflouie]

I've owned numerous cars with Michelin Pilot summer tires. In general, they had the best grip in the 33 to 36 psi (hot), about 3 psi lower when cold.

On my front wheel and AwD drive performance cars it was quite common to run the Michelins at a higher front pressure , 36 to 39 psi (cold) for best grip and wear.

 

[Gansan]

it makes sense for 130mph sustained, you want additional air pressure to lessen deformation in the tire where it contacts the road or else the friction will build up heat and cause tire failure. Fail in this case means chunks of rubber start coming off and the tire delaminating. It's not about grip but about safety.

 

[optronix]

I don't even understand why that would be in the manual.

Who is doing 130mph+ sustained? Hopefully no one on the street.

For everyone else, sticker on door jamb.

 

[Krazydan19]

All my cars I run sticker in the door jam as cold tire temps. I do have these same tires on my P3D which calls for 42psi cold, heavier car requires more pressure? Maybe ?

the ITS is heavier in the front which could be the reason for the 2 different cold temp psi

dealer spec safest place to start.

Side note anybody Get a manual that says “Type s” on it ? They gave me standard integra books. Said that was what they got.

 

[Integra23]

All my cars I run sticker in the door jam as cold tire temps. I do have these same tires on my P3D which calls for 42psi cold, heavier car requires more pressure? Maybe ?

the ITS is heavier in the front which could be the reason for the 2 different cold temp psi

dealer spec safest place to start.

Side note anybody Get a manual that says “Type s” on it ? They gave me standard integra books. Said that was what they got.

If it's the same as the digital copy both models are in that manual. Type S specifics are referenced by the 2.0L designation

 

[Krazydan19]

If it's the same as the digital copy both models are in that manual. Type S specifics are referenced by the 2.0L designation

Thanks. I’ve never opened the books, I’ll have to look

 

[Integra23]

Thanks. I’ve never opened the books, I’ll have to look

Same.

 

[Azkyrie6]

Thanks. I’ve never opened the books, I’ll have to look

Actually it’s from Integra A-spec owners opening the books that I initially found out the Type S was coming. Which is why I decided to not buy the base model and wait lol

 

[west]

Necroposting here, but US-standard XL tires (probably what you have on your ITS) reach their maximum load capacity at 41 psi, which is probably why the manual says set the front tire PSI to 41 if doing high speed driving.

If you are not doing high speed driving (and staying below 100mph) you can drop your PSI much lower for comfort levels.

Both the Ford Focus RS (what I have) and the Aston Martin DBX 707 (what a friend has) both recommend stupid high PSI from the factory (in theory so the car was good to go to 150mph+ speeds at any time), which is why I know about this stuff. I don't know if it is a British car thing to recommend the high speed PSI from the factory (both the Focus RS and DBX were designed in the UK, I believe).

Lo and behold, everyone complained about the ride quality on the Focus RS. Maybe it was because Ford recommended 46 PSI for all wheels from the factory. In reality, unless breaking over 125 mph, 36 to 38 psi is a better target PSI for the car, nearly 10 PSI lower.

In Porsche owner manuals, they talk about optimal tire pressures depending on what you are doing and what speeds you are planning on going. I think they might be the only OEM that actually talks about what tire pressures they recommend and why in their owners manuals.

It has been a while since I looked at this stuff, but you can look up load charts for different types of tires (like XL tire). Also the speed ratings for the tires ( (93Y) on the ITS factory tires, and nearly all tires designed for performance cars ).

Here's a Tire Rack article going over how to adjust tire pressures for higher speeds. Note that it talks about things generically, and then specifically talks about W rated tires at the end: https://www.tirerack.com/upgrade-garage/how-do-i-adjust-tire-air-pressure-for-high-speed-driving

And then links to a chart for Y rated tires here: https://www.tirerack.com/upgrade-ga...ent-for-high-speed-driving-yspeed-rated-tires

I think the tl;dr to all of this is if you are running the stock ITS tires and are staying below 136mph (really, I probably wouldn't pass 120 mph myself... looks like Honda says 210 kph which is 130.5mph) you can run whatever tire pressure the load chart for your tire type recommends, as long as it supports the load (total weight) you have on the car at each corner. Which means you need to know the car weight plus cargo weight.

If you think you will go 136+ mph, I think the easy thing to do is just adjust the tire pressure to the max PSI to get the full load rating, which I believe is 41/42 psi for the ITS. I am guessing based on the owner manual recommendations above Honda thinks it is OK to leave the rears at 33 psi due to the lack of weight on them vs. any other car. (Under 1,300 lbs in the rear when the car is unladen according to the internet??? I don't have easy access to the info on the door sill sticker as I write this so I can't confirm)

If you really want to nerd out on what pressures you can safely run (while in the lower speeds) to maximize comfort (at the expense of fuel economy if you get to low), you need to do the load index vs. PSI math for an XL Reinforced tire (if running factory tires) which this reddit post has the chart for:

 

[west]

Dunno why the forum doesn't like a reddit link, but here's the chart from the post:

 

[Reso]

All my cars I run sticker in the door jam as cold tire temps. I do have these same tires on my P3D which calls for 42psi cold, heavier car requires more pressure? Maybe ?

the ITS is heavier in the front which could be the reason for the 2 different cold temp psi

dealer spec safest place to start.

Side note anybody Get a manual that says “Type s” on it ? They gave me standard integra books. Said that was what they got.

"Type S" not mentioned in my 2026 manual either.

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