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swv9
02-22-2017, 10:17 PM
Hi friends

I need to know how much pressure I could use in my tires ContiPremium Contact 2 05/50 R15... (before I have 175/65 R14, changed by R15)

I have a New Yaris Sedan 2013 GLI https://upload.wikimedia.org/wikipedia/commons/thumb/0/0c/07-Toyota-Yaris-Base-sedan.jpg/300px-07-Toyota-Yaris-Base-sedan.jpg

Thanks, regards from Chile

Sorry for my english
SirDigby
02-23-2017, 09:20 PM
it does not matter the size. pressure is pressure.
the question is, what is your altitude?
sea level pressure is 30psi
3000 ft. (1000m) is about 32psi
5000 ft. (1500m) is about 33-34psi
7000 ft. (2100m) is about 34-35psi
10000 ft. (3050m) is about 36psi
IllusionX
02-23-2017, 09:26 PM
30psi? It really depends on the tire. I run Yokohama s.drive tires and they really need 35-38psi to wear evenly. And I'm almost at sea level.

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swv9
02-23-2017, 09:51 PM
it does not matter the size. pressure is pressure.
the question is, what is your altitude?
sea level pressure is 30psi
3000 ft. (1000m) is about 32psi
5000 ft. (1500m) is about 33-34psi
7000 ft. (2100m) is about 34-35psi
10000 ft. (3050m) is about 36psi

I am in Los Andes city, Chile... 819m aprox
https://en.wikipedia.org/wiki/Los_Andes,_Chile
Rigaud
02-23-2017, 09:51 PM
it does not matter the size. pressure is pressure.
the question is, what is your altitude?
sea level pressure is 30psi
3000 ft. (1000m) is about 32psi
5000 ft. (1500m) is about 33-34psi
7000 ft. (2100m) is about 34-35psi
10000 ft. (3050m) is about 36psi
Oh boy.......YES tire size makes a difference. The bigger the less psi is required to a certain extent.

I run 205/45R16 with 30-31psi front and 26psi rear. I usually make a chalk marl on the sides and drive the car on and off highway then look at the wear mark off the chalk. I then adjust accordingly + or -.
swv9
02-23-2017, 09:52 PM
30psi? It really depends on the tire. I run Yokohama s.drive tires and they really need 35-38psi to wear evenly. And I'm almost at sea level.

Sent from my SM-G930W8 using Tapatalk

so?

I think the pressure depends more on the vehicle than on the tire or not?++

Because if a tire of a measurement, I use it in different cars, the weight changes therefore another pressure
kimona
02-24-2017, 12:00 AM
http://blog.toyota.co.uk/toyota-tyre-pressure-and-size-guide

http://www.puretyre.co.uk/toyota-tyre-pressures/
SirDigby
03-01-2017, 09:43 PM
I was just starting with the door sticker setting and adjusting for loss of pressure due to altitude, but temperature and humidity can also make slight changes. here's a chart:

http://www.yarisworld.com/forums/picture.php?albumid=1228&pictureid=6223