tntrac

What do you guys have the pressure at? Does each wheel's pressure deviate from each other much?

Mine is a Base AWD.
Tt

EXCALIBUR1

35 psi works for me.

NooYawkuh

I just aired up this morning. Door sticker says 33 psi. I've always been in the habit of running >36.

I find that the dashboard and AcuraLink app are pretty accurate to my handheld tire gauge.

tntrac

AcuraLink is free as a trial when you first buy the car?

Fred Flint

Mine came at 44 PSI and I have left it at that to tell the truth, 2020 Advance SH-AWD

grandicornis

The cars ship, and most are stored at the dealer, with the tires at 40+ psi to prevent flat spots during long term storage. Do yourself a favor and drop the pressure to between 32 and 35psi as recommended and you'll get a smoother, quieter ride. Leaving the tires over inflated will also tend to wear out the center of the tread prematurely.

Best time to adjust the pressure is early in the day before you drive the car and before the sun shines on the tires too long.

romer

35 all around. The trie pressure indicator on the car shows as 35. When they drop to 34 I leave it there. Once they start showing 33 I fill up to 35 again. It takes months between changes. First car this has been the case. Usually it's every 4-6 weeks. But not the RDX after one year of ownership.

NooYawkuh

Yes. Basic is complimentary. 6 month trial for Remote and Concierge. 12 month trial for Security.

https://acuralink.acura.com/#/compat...2019&model=RDX

NooYawkuh

44 psi is too much. That might even be maximum recommended pressure on the sidewall.

tecwerks

I second that observation.

JB in AZ

Just a silly question....did both of your dealers install Nitrogen in your tires?

I can't think of any other reason why the RDX's tires would loose pressure any differently than any other vehicle.

RDX-Rick

I set mine at 35 PSI which gives a slightly firmer ride, but more control when cornering at high speeds.

The pressure must be set after the car has been sitting unused for an overnight period, and the tires have not been exposed to the sun.

The pressures will rise after driving for a period of time, and the front tires will rise to a higher pressure due to the heavier weight being supported, and the extra movement due to steering. If one side of the car has been exposed to the sun, the tires on that side will increase in pressure more than the tires on the shady size.

As the weather becomes cooler in the Fall, the pressures in the tires will also drop, and minor corrections will have to be made. As spring and summer temperatures arrive the pressures will begin to rise and some air will need to be removed to lower the pressure. A change of 10 degrees in temperature will result in a 1-2 PSI change in pressure. The use of nitrogen reduces the change in pressure with temperature slightly, but does not eliminate it. After all, the air we breath already contains 78% nitrogen.

tecwerks

Not this dealer. As a matter of fact after I purchased the vehicle a year ago the tire pressure was on the low side so I added some. BTW, I like the beep notification once you reach the proper PSI.

robnalex

Huh?

tecwerks

Its a feature called Tire fill assist. You can see the details here <https://owners.acura.com/vehicles/information/2019/RDX/features/Tire-Pressure-Monitoring-System-with-Tire-Fill-Assist>

NooYawkuh

I never bothered to try that but I don't care to leave the engine running while I'm airing up the tires when a handheld tire gauge will do just fine. It doesn't say what pressures it considers properly filled or over-filled. I use a small 12V compressor that clips to the battery. I will never use one of those coin-operated gas station compressors unless I absolutely have to.

I wonder why so many of us have different pressures listed on the door sticker.

markm929

Based on the OM, there are two tire pressures, 20 inch wheels is 36psi, and the 19 inch tires is 33psi. My Advance with 19 inch wheels has a door sticker listing 33psi, matching the OM.

Yotrek

didn't know the feature is there, good to know, next time I will try it..

NooYawkuh

Yeah, that's what mine says but I always go a bit higher. I misread a few posts above, thinking that what they inflate to is what their sticker says but most people do what I do.

I checked the sidewall on my Continentals and they say the max pressure is 51 psi.

tecwerks

Overinflated tires = harsher ride, bad handling, uneven tire wear. If that’s your bag then I give you my condolences.

NooYawkuh

I don't over-inflate, so I don't need you condolences or you condescension.

tecwerks

Whatever, Your sticker says 33 psi and you stated that you inflate to 36 psi. Sounds like over inflated to me.

SCWinner

My RDX came out of the dealer inflated to 41 all around. Just dropped it down to 35 and it's a much better ride.

tsxowner1

Same here....dropped it to 36psi the next morning. I think the dealers or maybe from the factory set it higher to prevent flat spots.

NooYawkuh

Everybody is OVER inflating their tires. It's madness, I tell you. MADNESS!!

tecwerks

I really do not care. I set PSI to what the manufacturer recommendation is. If you want to make a big project over how you put air in your tires with special air etc I don't really give a damn.

Have a nice day.

tsxowner1

Why would you say it’s over inflated, the psi listed on the door for an A-Spec is 36....do you know something that Acura don’t?

NooYawkuh

What do you do about the 3-5 psi variability just from temperature and driving conditions? Do you stop and let air out when the pressure goes up 2-3 psi? Do you stop and add air if it drops 1 psi below? I mean, if you're not running exactly what the manufacturer recommends, you're either over-inflated or under-inflated.

tecwerks

Now you are just being a monkeys ass or stupid. Pick one or both.

JB in AZ

I think the point is that Acura recommends a PSI for their tires on each model, knowing very well that the pressure will go up with both ambient temperature and driving, which increases the temp in the tires. They know that there will be owners who don't check the pressures and end up running a few pounds below recommend, and others that like to add a few pounds.

Oh, lets just call it a range and be done with it.

Run your tires were you feel best about it, but not too far below recommended by the manufacturer.


No need to be calling other members any names here.

Wander

Well, Fred Flintstone does like his tires rock hard...

For the rest of us, modern radial tires are pretty forgiving. You're not likely to blow a tire off the rim with high pressure unless you really work at it. But you may wear the center of the tire tread prematurely. And you may rattle your teeth out.

It's pretty routine ( and sometimes required ) to run tires at higher pressure on the track to reduce the risk of rolling the tires off the rim during hard cornering. Apparently it's a real pain to scrape cars off the fence.

But running at a very low pressure increases the risk of overheating the tire at high speeds and causing sidewall failure. That can spoil your day. And that's why we have TPMS systems in modern cars.

gtssenior

I do a monthly check with a manual tire gauge in the morning before driven set to 35 psi. Readouts/warning icon on the console are just to tell me if I get a puncture or some unexpected loss of pressure which is a good thing.to know before the vibration on the road tells me. Guess I am old school from too many years of driving without this technology and still have an affinity for the manual gauge..

romer

No nitrogen. I’ve been surprised by how durable the tire pressure readings have been. Both on the dash and when I check. My hand held is calibrated for tenths of a pound and very accurate. Several people here have questioned this when I’ve reported it but it’s the truth. I check it every time I start the car. I can’t explain it but I too am surprised by it.

jesser916

36 cold on all 4.

lil12002

I was just wondering about this too i would normally fill up my TL tires monthly but I bought the rdx in end of April and have not needed to fill up, they are currently at 36 psi its 4 am and 55 F outside.

Im going on a road trip this weekend about 1500 miles round trip, should i drop them down to 33 psi in the morning when I wake up or tomorrow so i can have a smooth ride and my mph not effected.

ceb

Let me clarify a few misconceptions.

The "recommended" PSI on the door pillar is the manufacturer's swag at getting a happy medium between comfort (lower), treadwear (higher), handling (higher) and fuel economy (higher). In the luxury segment, the manufacturers always lean towards comfort.

In general, tire wear increases radically at 20% below the recommended pressure. At 25% below it can become dangerous. On the over inflation side, you'll get increased center wear at about 25% over, but you will see a marked fuel economy increase if you bump up your tire pressures by about 20%. It becomes dangerous if you exceed the "max inflation" of the tire as marked on the sidewall.

As others have said, each 10 degree change in temps increases or decreases your pressure by one psi. You also lose one psi as every month goes by.

The TREAD Act, requires that the TPMS system alerts drivers at least at 25% low and most alert at around 20% - Acura tends to alert at 15 to 20%.

Example. You buy your car in June and the dealer makes a mistake and actually sets your tire pressure correctly at 33. It is 90 degrees. In July, the temps are a bit warmer so that cancels out the pressure loss caused by time, but August has 80 degree temps so you're at 31 (1 psi for temps, 1 for time). September is mid 70's but October is in the high 60's, to 3 more psi lost so 28 psi. Late October in the morning you'll get the TPMS warning come on.

Driving on a correctly inflated tire increases the pressure by about 2 to 3 psi from cold to hot and highway driving by 3 to 4. A under-inflated tire heats up faster/more so add a psi or so to the numbers I mentioned earlier.

My recommendation is to start with the recommended value and bump it up by 2psi, drive it awhile and bump it up by another 2psi if you like.

tecwerks

I set mine to 35psi cold temp all year as the door sticker recommends for the ASpec. I don't want to go higher as I would rather have more rubber in contact with the road since I drive on mainly curvy mountain ones. If I really want to wind it up I like to go with 32psi. Buying tires more often and increased gas mileage is not a concern of mine. A great primer though for the uninitiated.

srvadlamani1

Guys -

Just bought my new 2020 Acura RDX SH-AWD with Advance. The car has Continental tires, and the dealer filled it with Nitrogen (supposed to be good for the tires - but I really have no clue!). I tried various drive modes to see if that impacted the ride (no difference as far as I can tell). That leads me to wonder if this is a Nitrogen thing? Also, the current pressures I see on the car are as follows (Right front - 38psi , Left Front - 37psi . Right Rear - 37psi , and Left Rear - 36psi ). Are these right or too high? What can I do to improve the ride somewhat? Also, is there a trade-off between the tire pressure and gas mileage? By the way, that was the pressures when the car was delivered to me (2 weeks ago now)

Sorry for the list of questions, but just trying to figure out my new car!

Thanks in advance for your help!

Sri

srvadlamani1

Guys -

Just bought my new 2020 Acura RDX SH-AWD with Advance. The car has Continental tires, and the dealer filled it with Nitrogen (supposed to be good for the tires - but I really have no clue!). I tried various drive modes to see if that impacted the ride (no difference as far as I can tell). That leads me to wonder if this is a Nitrogen thing? Also, the current pressures I see on the car are as follows (Right front - 38psi , Left Front - 37psi . Right Rear - 37psi , and Left Rear - 36psi ). Are these right or too high? What can I do to improve the ride somewhat? Also, is there a trade-off between the tire pressure and gas mileage? By the way, that was the pressures when the car was delivered to me (2 weeks ago now)

Sorry for the list of questions, but just trying to figure out my new car!

Thanks in advance for your help!

Sri

Funz51

yes, reread 'ceb' comments above. your pressures are fine. If anything, add a little air to LR and remove a little from RF to even them out when they are cold. if they go below 34 when cold, add a couple lbs. If you go over 38, remove some. this is all measured on cold tires (left alone for a few hours, overnight if possible).