Tire Pressure for different wheel size
- Thread starter OtherSide
- Start date
- :
- 2022 CX-5 Turbo
If you did not change tire width and diameter, the contact patch remains the same size.
In this case, I think you can keep the same PSI.
If you go wider tires, you can go lower in PSI.
contactPatchInInchesSq * tirePSI * 4 = supporting weight (lbs) of vehicle.
In general, that is.
Assume contact patch is 25 inch^2..
25 * 35 * 4 = 3500 lbs.
In this case, I think you can keep the same PSI.
If you go wider tires, you can go lower in PSI.
contactPatchInInchesSq * tirePSI * 4 = supporting weight (lbs) of vehicle.
In general, that is.
Assume contact patch is 25 inch^2..
25 * 35 * 4 = 3500 lbs.
- :
- Toronto, ON
- :
- 2021 CX-5 GT Turbo
Tire Pressure Calculator
Easy to use tire pressure calculator. Use our tire pressure calculator to calculate the new tire pressure needed when changing tire sizes.
@johnrm Thanks! The Michelin winter tires shows Extra Load printed on the tire.
@dunhillmc Yeah, the x-snows has slower speed rating. I don't drive more than 125km/h. I will have to read more about speed ratings. Thanks!
@ceric As far as I know the winter tires sill have the same width and diameter. I bought it from Mazda dealership last year and they installed it, that is why I don't know about tires. But this winter I decided to learn more about my car and save money switching tires during summer and winter. Thanks!
@FerrariF1 Thank you for the link, very helpful. If I entered the correct info, it shows 32psi.
Setting 35psi for winter tires to account for -20C temp would be ok?
@dunhillmc Yeah, the x-snows has slower speed rating. I don't drive more than 125km/h. I will have to read more about speed ratings. Thanks!
@ceric As far as I know the winter tires sill have the same width and diameter. I bought it from Mazda dealership last year and they installed it, that is why I don't know about tires. But this winter I decided to learn more about my car and save money switching tires during summer and winter. Thanks!
@FerrariF1 Thank you for the link, very helpful. If I entered the correct info, it shows 32psi.
Setting 35psi for winter tires to account for -20C temp would be ok?
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- Toronto, ON
- :
- 2021 CX-5 GT Turbo
Absolutely. I do the same, 3psi higher than recommended, since I set my pressures in the underground garage which is 20-30 degrees warmer than outside in winter.
Great! Thanks for your input!
- :
- Toronto, ON
- :
- 2021 CX-5 GT Turbo
It's only better traction in snow and ice, not on cold, wet roads. Most of the time the roads are plowed and salted, in which case proper pressure is better.
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- Pueblo county CO
- :
- CX-5 Sport 16.5 6M
If you lower the air pressure A LOT, like down to the ' teens, the tire will flatten out some a 'supposedly' give more traction.
I don't think lowering from 35psi down just a few pounds will help, unless 35psi is causing the tire to ride on the center tread, which means it was overinflated.
I always add some air this time of year to compensate for the air's reduced volume at lower temps. I think about one psi per ten degrees F' will work.
Here is some information from Tire Rack about increasing tire pressure during colder temperatures
https://www.tirerack.com/tires/tiretech/tech-page.jsp?techid=168
On the Michelin website they note… Winter guide | Get ready for winter | Michelin Canada
Take your pick of information. I normally set the pressure specific to the vehicle’s manufacturer as noted on the inside sill of the drivers door.
https://www.tirerack.com/tires/tiretech/tech-page.jsp?techid=168
On the Michelin website they note… Winter guide | Get ready for winter | Michelin Canada
“Adjusting pressure in cold temperatures
If you are adjusting your tire pressure outside in ambient temperature, set it to the vehicle manufacturers’ recommended pressures.”Take your pick of information. I normally set the pressure specific to the vehicle’s manufacturer as noted on the inside sill of the drivers door.
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