I can’t drive with 35 PSI (in OEM Toyo tires)!
- Thread starter stack316
- Start date
- :
- 2023 CX-5 with Premium Plus trim in Soul Red Crystal Metallic
I purchase my new CX-5 almost a month ago. I have ordered a new tire inflator and pressuere gauge that arrived last week. I did find the tires were over inflated at about 41 PSI. The two in front are now 36 PSI and those in the back 35.80 PSI. The pairs match and are pretty close to the door panel recommendation of 35 PSI. I am at 899 miles. This thread reminded me to check that.
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- Plano, Texas, USA
I wouldn’t bother to lower the tire pressure at 36 / 35.8 psi F/R, assuming you have 19” tires: Mazda used to recommend 36 psi for 19” tires and I keep my 19” tires at 39 psi cold for even wear.
Do check your compact spare and it usually is much lower than 60 psi!
Tire pressure is set by weight to contact patch.
Since we don't have race cars, we won't put the car on four scales.
On 19" OEM 225/55 r19 have tires that are 99 sidewall. We weighed my 2.0 fwd KF. Premiumcontact 6 Contis
3/4 tank
Proper pressure for
front left 33.5 PSI
front right 33.4
Rear right 32.0
Rear left 32.1
With four passengers and a full trunk be at 26 to 28.
Unladen, more that 34 psi makes the car start to feel uneasy, jittery, jumpy and skiddy. 39+ unladen is dangerous.
The proper pressure depends on weight on that axle. Only that will give you the correct AND SAFE contact patch size. Get a decent pressure gauge. Run what's stated in the door jamb or manual. It's there for a reason.
Let's list what's stated by Mazda?
2.0 2028 EU 2.0 165 HP
2.3 unladen
2.6 4 people and full trunk
A diesel 4x4 is definitely HEAVIER so probably gonna guess 35/36
What's on yours?
To find your perfect pressure, start there all around and go up two psi and drive, then go down 4 and drive, the go up 3.
You will know.
Since we don't have race cars, we won't put the car on four scales.
On 19" OEM 225/55 r19 have tires that are 99 sidewall. We weighed my 2.0 fwd KF. Premiumcontact 6 Contis
3/4 tank
Proper pressure for
front left 33.5 PSI
front right 33.4
Rear right 32.0
Rear left 32.1
With four passengers and a full trunk be at 26 to 28.
Unladen, more that 34 psi makes the car start to feel uneasy, jittery, jumpy and skiddy. 39+ unladen is dangerous.
The proper pressure depends on weight on that axle. Only that will give you the correct AND SAFE contact patch size. Get a decent pressure gauge. Run what's stated in the door jamb or manual. It's there for a reason.
Let's list what's stated by Mazda?
2.0 2028 EU 2.0 165 HP
2.3 unladen
2.6 4 people and full trunk
A diesel 4x4 is definitely HEAVIER so probably gonna guess 35/36
What's on yours?
To find your perfect pressure, start there all around and go up two psi and drive, then go down 4 and drive, the go up 3.
You will know.
It's got to feel uneasy and even unsteady at highway speed.
You can check with chalk and similar technique. There YouTube videos about it.
Also here is a video about the contact patch.
Tire Contact Patch Dynamics Explained
This is Part 6 of my 10 part series on how race car tires/tyres work. This part covers the dynamics of a tire's contact patch. Facebook: https://www.faceboo...
youtu.be
Ok I geek about this stuff.
Here is the entire series to the above video.
Here is the entire series to the above video.
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- Plano, Texas, USA
I definitely got confused here. Are you saying the proper normal tire pressure should be 32.0 ~ 33.5 psi; but when we full-loaded our CX-5 with 4 passengers and a full trunk the tire pressure should be lowered to 26 ~ 28 psi?
I use 39.5 psi since new on my CX-5 for maximum even tire wear and fuel efficiency. My stock Toyo A23’s lasted 44,032 miles and wore evenly. I’ve never felt uneasy、jittery、jumpy and skiddy while driving my CX-5. Not to mention feeling dangerous under any road conditions even in occasional snowy weather.
Yes、yes.
Yes. And this’s Mazda’s tire pressure recommendation in the manual and on the gas filler door / door jamb worldwide:
See above.
Last edited:
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- Plano, Texas, USA
No, I’m not. See my previous reply. Actually in the old days we usually need to put 3 more psi while driving on the highway as stated in the owner’s manual. More recently, higher tire pressure is recommended when you’re driving at high speed (>100 mph) such as this tire pressure label on the gas filler door from my 2001.5 VW Passat.It's got to feel uneasy and even unsteady at highway speed.
You can check with chalk and similar technique. There YouTube videos about it.
Also here is a video about the contact patch.
Tire Contact Patch Dynamics Explained
This is Part 6 of my 10 part series on how race car tires/tyres work. This part covers the dynamics of a tire's contact patch. Facebook: https://www.faceboo...
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- 2016.5 CX-5 GT AWD titanium/black 2016 Miata Club ST MT white
What in the heck are you going on about?
No one, and I mean NO ONE is going to be able to tell the difference between a tire inflated to 33.4psi verses a tire inflated to 33.5psi or 32.0 vs 32.1.
I set my cold pressures to 38psi all around and the CX is certainly NOT uneasy, jittery, jumpy, and/or skiddy.
That's ridiculous.
