Tire pressure setting - Infiniti QX30 Forum
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post #1 of 10 (permalink) Old 06-13-2017, 10:20 AM Thread Starter
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Default Tire pressure setting

Hi, another question, not so silly.

the QX30 Premium AWD I have has the Continental run-flats. What is the recommended tire pressure? Right now, all tires are set to 51PSI. That seems crazy high (it is the max PSI according to the tirewall), but I have never had run-flats before....

51 PSI? Am I high? heh heh.

May explain some of my rattles if so!

the tire placard in the door jam has a lower rating, cannot recall, but not 51PSI!
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post #2 of 10 (permalink) Old 06-13-2017, 03:44 PM
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If i remember right, front 35 psi, back 29 psi when cold/super early morning before sun rises to heat them up.

I set mine at front 37 psi, back 32 psi when it is 50 degrees out. The temperature today is nearly 100 degrees so my tires are bouncing like ping pongs.

Yes, you need to re-adjust your tire pressures.
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post #3 of 10 (permalink) Old 06-14-2017, 12:07 PM Thread Starter
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Thanks for the response. Set to 37 front, and 32 rear last night (warm night). HUGE difference. Some junior at the dealership decided to use the tire MAX PRESSURE recommendation on the sidewall to pump each tire to 51 PSI, hitting 53PSI while driving on the freeway.

Very unsafe and I'll be speaking to the district manager...
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post #4 of 10 (permalink) Old 06-16-2017, 12:18 PM
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You might want to consider getting nitrogen in your tires since it maintains pressure better than the traditional method. The only problem is if you need to top it up, you can only use nitrogen. But there might be something on-the-go you can keep to make that easy.
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post #5 of 10 (permalink) Old 06-16-2017, 03:24 PM Thread Starter
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Thanks for the advice, but I'm the type of guy who checks his tires frequently. This problem was different; clearly ignorance on what tire pressures should be set to and definitely NOT the max PSI on the sidewall! The difference is unbelievable, obviously.
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post #6 of 10 (permalink) Old 06-17-2017, 10:40 PM
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Mine is at apx 40 psi. I had a screw in one tire and the sensor went off. Three tires were 38-40 and one went down to 28. I got it fixed and they put them all at 40 ish.
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post #7 of 10 (permalink) Old 06-18-2017, 10:40 PM
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I have a QX30 Premium AWD and also have Continentals, but how do I know if they are the run flats?
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post #8 of 10 (permalink) Old 06-20-2017, 12:58 PM
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jimmy, if they are the ones that came with the car, they are definitely run flats. If you look under the trunk floor, you'll notice you do not have a spare tire.

Pressure is 34ish I believe. Check the sticker on the driver door area near where the seat belt is when you open the door. Ignore what the tires say and go by what the manufacturer lists.
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post #9 of 10 (permalink) Old 06-21-2017, 02:51 PM
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Can someone confirm that the sport model QX30 with the 19" wheels should have tires only inflated to 32 psi? I believe that is what I found online, but want to confirm. Thanks.
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post #10 of 10 (permalink) Old 06-22-2017, 10:30 PM
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The door on mine says cold psi of 35 front and 29 rear. I have the 18 inch wheels. I find that odd, though, because when I had a screw in one of my rear tires, the TPS warning went off and it was at 28 psi according to the information on the dash.
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