Tire pressure
Thread Starter
2nd Gear Member
Joined: Jun 2011
Posts: 271
From: new york
Tire pressure
I have bigger tires on my gt. Front is 245/45/19 and rear is 275/40/19. The recommended pressure was 32psi while the wheels were stock. Maybe this is dumb, but i suppose since the tires are bigger they should be running on more than the stock pressure? It hit me today when I checked the pressure in them... they were at 40 (max is 50). I figured 37 all around would be good. What would be best to get the longest life out of them?
6th Gear Member
Joined: Jun 2007
Posts: 16,182
From: PA to KY ('07) to IL ('09) to MS ('10) to FL ('11)
You realize there are always tradeoffs... Higher pressure = rougher ride, negative impact on handling, less rolling resistance.
I typically go by the pressure stated on the door placard or on the tire's RECOMMENDED pressure and then adjust up and down by 2 PSI until I find what I prefer. Why worry about saving about 6 months of tire life by giving up handling on a performance car? I typically run at 32-34 PSI but each tire brand/model can be different. And remember that tire pressure will change about 1 PSI for every 10 degree F change in ambient temperature.
I typically go by the pressure stated on the door placard or on the tire's RECOMMENDED pressure and then adjust up and down by 2 PSI until I find what I prefer. Why worry about saving about 6 months of tire life by giving up handling on a performance car? I typically run at 32-34 PSI but each tire brand/model can be different. And remember that tire pressure will change about 1 PSI for every 10 degree F change in ambient temperature.
Thread Starter
2nd Gear Member
Joined: Jun 2011
Posts: 271
From: new york
You realize there are always tradeoffs... Higher pressure = rougher ride, negative impact on handling, less rolling resistance.
I typically go by the pressure stated on the door placard or on the tire's RECOMMENDED pressure and then adjust up and down by 2 PSI until I find what I prefer. Why worry about saving about 6 months of tire life by giving up handling on a performance car? I typically run at 32-34 PSI but each tire brand/model can be different. And remember that tire pressure will change about 1 PSI for every 10 degree F change in ambient temperature.
I typically go by the pressure stated on the door placard or on the tire's RECOMMENDED pressure and then adjust up and down by 2 PSI until I find what I prefer. Why worry about saving about 6 months of tire life by giving up handling on a performance car? I typically run at 32-34 PSI but each tire brand/model can be different. And remember that tire pressure will change about 1 PSI for every 10 degree F change in ambient temperature.
1st Gear Member
Joined: Feb 2014
Posts: 101
From: Missouri
When I don't put the same tires back on a vehicle I go by the max pressure, then back it off until I'm happy with the ride and tire wear. This may take a month or so to find the sweet spot but that's the only way I know how to do it.
4th Gear Member
Joined: Aug 2008
Posts: 1,214
From: Panama City, FL
For tread wear you want the tread flat. Draw a chalk line across the tread and roll the car forward enough to wear the chalk off. Adjust pressure until you get an even pattern.
Another way is to roll over damp pavement and look at the print it leaves on dry pavement. Adjust for flat pattern.
Another way is to roll over damp pavement and look at the print it leaves on dry pavement. Adjust for flat pattern.