When i recently went to the dealer the tech told me that he had inflated my 18 inch tires to 34 psi. I asked him why. The specs call for 36 psi. He told me that 18 inch is 34 and that the 20's are 36 psi. In the owners manual it states that the 18 inch are 36 psi and that the 20 inch are 34 psi. Who is right the owners manual or the tech. I have not adjusted yet until i get clarification and this i feel is the best place to ask.
Tire inflation specs.
- Thread starter kornholio
- Start date
Jasonjames
Member
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- Mazda 2002 BJ Astina 323 1.8 L
It's better to overinflate than underinflate. If a tire is running pressures below 26 psi the sidewalls flex a lot each time the wheel turns. For your vehicle, the manual *may* tend to keep pressures a little low to enhance ride-comfort,...I'd be guided by the tire fellow Also 2 psi is virtually un-noticeable when quoting 34 or 36 psi. I keep the P5's tires at 30 psi, and they're 14" wheels. Tire-life is extended, plus grip is improved at the higher inflation-rates.
J J
J J
Ceric, i know that in the pillar it says 36 psi for the 18 inch wheels. What i was wondering is if this changed at some point since i bought the car in 2007. I will put in the other 2 psi and keep them at 36. What surprises me is that the owners manual specs for the 20 inch tires is 34 psi.
I am guessing that it was done for handling reasons. The 18s have a taller tire sidewall which means more flex when cornering. The 20s naturally have a shorter sidewall by about an inch. Low profile tires also tend to have slightly stronger sidewalls which all add up to better handling and a harsher ride. Keeping the 20s at 34psi will keep ride quality somewhat better while maintaining pretty good handling and turn in response.
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- 2010 CX-9
20's on 2010 GT AWD say 34 on door jam sticker
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- Banned For Being A Troll
Why would to discuss it with a Shaved Ape at the garage when it is clearly written in the book.
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- 2009 CX-9 Touring AWD
I bought a tire gauge and decided to check the pressure in my Touring's 18" tires today (first time since buying the car 4 months ago) and all 4 were 6 psi low at 30psi (cold). However, I read this thread http://www.mazdas247.com/forum/showthread.php?123706071-CX9-Tyre-pressures and am now thinking of "over" inflating them by about 5 pounds to 41psi or so (cold). What do you guys run your tire pressure at?
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- 2009 CX-9 Touring AWD
I just inflated my 18" duellers to 40psi cold and drove them 20 miles or so with no noticeable difference in handling dynamics vs. how they were at 30psi cold for the last two months! However, I did notice that the sidewall max psi is 40, and it says something like "NEVER exceed the max. pressure... "
But then I have been reading this site.
http://www.cleanmpg.com/forums/showthread.php?t=6547
Wonder how much fuel economy gains the cx-9 could achieve using those techniques.
well guys,
I just bought a 2013 cx9 (not sure of the model) in the Dominican republic trims vary than the offers from the us, mine comes with 18" wheels an tires but comes with Bluetooth and backup camara and some items that in the us would be optional for the touring model. anyways I switched from a 2011 bmw 3 series to the mazda based on that it was a sporty SUV (CUV) something was amiss right away when I got my car. it felt to jittery and too sensitive of any steering wheel movement, even the slightest movement made the car kind of swerve one way or the other.
yesterday I went on a 250 mile drive for work and going 100 mph the car felt totally out of control, I mean totally, almost like hydroplaning. so I kept it under 70 and was frustrated to say the least at how unsafe I felt driving my brand new chiny new car.
well, today for the first time (my mistake) I went and had the tire pressure checked, oh my god, the mazda dealer gave me the car with 60 psi on all 4 tires, literally I was driving on balloons, took them down to 36 psi and now I get what everybody talks about, it drives like a very well planted car, rides smoother and just feels like more in control.
so to those of you who want to overinflate to get better mpg, I would recommend not going over 40 because you will sacrifice a lot of control of the car and the tires will not las as long.
just my input
regards,
eduardo
I just bought a 2013 cx9 (not sure of the model) in the Dominican republic trims vary than the offers from the us, mine comes with 18" wheels an tires but comes with Bluetooth and backup camara and some items that in the us would be optional for the touring model. anyways I switched from a 2011 bmw 3 series to the mazda based on that it was a sporty SUV (CUV) something was amiss right away when I got my car. it felt to jittery and too sensitive of any steering wheel movement, even the slightest movement made the car kind of swerve one way or the other.
yesterday I went on a 250 mile drive for work and going 100 mph the car felt totally out of control, I mean totally, almost like hydroplaning. so I kept it under 70 and was frustrated to say the least at how unsafe I felt driving my brand new chiny new car.
well, today for the first time (my mistake) I went and had the tire pressure checked, oh my god, the mazda dealer gave me the car with 60 psi on all 4 tires, literally I was driving on balloons, took them down to 36 psi and now I get what everybody talks about, it drives like a very well planted car, rides smoother and just feels like more in control.
so to those of you who want to overinflate to get better mpg, I would recommend not going over 40 because you will sacrifice a lot of control of the car and the tires will not las as long.
just my input
regards,
eduardo
very much so sir. good thing i am used to driving fast and handling fast cars. any person without driving experience might have gotten in an accident since the cx9 is a fast one.
