OEM Tire Pressure Recommendation Changed for MY2015+?

NoHyperbole · 07-18-2015, 08:18 PM

If I'm not mistaken, the recommended cold tire pressure for the Sport Package 19-inch tires on 2009-2014 370Zs is 35 psi.

I was surprised to see the door jamb sticker of a 2015 Sport Tech 370Z showing a recommendation of 32 psi. The tires are still the same type (Bridgestone RE050) and size.

critical · 07-18-2015, 09:53 PM

Quote:

Originally Posted by NoHyperbole

If I'm not mistaken, the recommended cold tire pressure for the Sport Package 19-inch tires on 2009-2014 370Zs is 35 psi.

I was surprised to see the door jamb sticker of a 2015 Sport Tech 370Z showing a recommendation of 32 psi. The tires are still the same type (Bridgestone RE050) and size.

Has anyone else noticed this?

what does it say on the tires? 32 or 35? maybe bridgstone changed the tires slightly or Nissan is trying to get you more grip out of a so so tire.

Spooler · 07-19-2015, 01:30 AM

It means they made a suspension change and the tire pressures needed to drop for optimal tire wear.

NoHyperbole · 07-19-2015, 10:54 AM

Quote:

Originally Posted by critical

what does it say on the tires? 32 or 35? maybe bridgstone changed the tires slightly or Nissan is trying to get you more grip out of a so so tire.

Tires specify only the maximum inflation.

6spd · 07-19-2015, 10:57 AM

I run my fronts at 35 and my rears at 32, any higher and I start to get an unsettled feeling at highway speeds. 32 is definitely a good choice for the newer Z's with the different shocks.

NoHyperbole · 07-19-2015, 11:01 AM

Quote:

Originally Posted by Spooler

It means they made a suspension change and the tire pressures needed to drop for optimal tire wear.

You're right.

NoHyperbole · 07-19-2015, 11:07 AM

Quote:

Originally Posted by 6spd

I run my fronts at 35 and my rears at 32, any higher and I start to get an unsettled feeling at highway speeds. 32 is definitely a good choice for the newer Z's with the different shocks.

Excellent advice.

pokeyl · 07-19-2015, 11:33 AM

It is all about ride. Most want a smoother ride. It is not suspension or wear.

6spd · 07-19-2015, 10:31 PM

Quote:

Originally Posted by NoHyperbole

For street driving, I agree with you about the car feeling unsettled at anything higher than 35 psi on the front. When I tried 36 and 37 psi, there was a noticeable difference, and not for the better. Also, when I tried 32 and 33 psi, the car felt like it gripped better while cornering, but the crispness of the steering was sacrificed, and it felt "mushy."

As for using 32 psi on the rear tires, that's actually an easy way to get more rear grip and reduce the chance of oversteer. Plus, it probably makes the ride a little better.

Exactly, the 35 in the front helps make steering a bit sharper and 32 in the rear helps grip

NoHyperbole · 10-03-2015, 09:49 AM

PSI is vehicle depedent.

kenchan · 10-03-2015, 05:20 PM

Quote:

Originally Posted by critical

what does it say on the tires? 32 or 35? maybe bridgstone changed the tires slightly or Nissan is trying to get you more grip out of a so so tire.

tires usually only have max pressure.. have to look at the door jam for the recommended psi for the vehicle.

maybe too many complaints about harsh ride and they softened it up for the weak.

07-19-2015, 10:57 AM	#5 (permalink)
6spd A True Z Fanatic Join Date: Aug 2009 Location: South Florida Posts: 3,001 Drives: Q50RS Rep Power: 25	I run my fronts at 35 and my rears at 32, any higher and I start to get an unsettled feeling at highway speeds. 32 is definitely a good choice for the newer Z's with the different shocks. __________________ -Jay- jonathanjamesphotographer.com

07-19-2015, 11:33 AM	#8 (permalink)
pokeyl Track Member Join Date: Nov 2010 Location: DFS Posts: 896 Drives: ??? Rep Power: 55	It is all about ride. Most want a smoother ride. It is not suspension or wear. __________________ It's not my fault I'm old, I was born a very long time ago!

10-03-2015, 09:49 AM	#10 (permalink)
NoHyperbole Base Member Join Date: Jan 2014 Location: Los Angeles Posts: 216 Drives: N/A Rep Power: 11	PSI is vehicle depedent. Last edited by NoHyperbole; 05-01-2016 at 06:38 PM.

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07-19-2015, 01:30 AM	#3 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,798 Drives: 2013 Nismo 370z Rep Power: 2684392	It means they made a suspension change and the tire pressures needed to drop for optimal tire wear.