tire pressure
Race Director
Joined: Oct 2000
Posts: 12,640
Likes: 3,103
From: Shamong, NJ
The factory recommended cold pressures were 20 lb front, and 26 rear. This was for the OEM GR70x15 radial. Your P225/70R15's, are the modern equivalent, of the original GR70's.
I think Chevrolet was going for a better ride, with these pressures. Personally, I think they are to low for crisp handling and proper braking. I always run around 28-30 lbs, but that's just my preference.
I think Chevrolet was going for a better ride, with these pressures. Personally, I think they are to low for crisp handling and proper braking. I always run around 28-30 lbs, but that's just my preference.
Melting Slicks
Joined: Aug 2012
Posts: 3,487
Likes: 83
From: Titusville Florida
The factory recommended cold pressures were 20 lb front, and 26 rear. This was for the OEM GR70x15 radial. Your P225/70R15's, are the modern equivalent, of the original GR70's.
I think Chevrolet was going for a better ride, with these pressures. Personally, I think they are to low for crisp handling and proper braking. I always run around 28-30 lbs, but that's just my preference.
I think Chevrolet was going for a better ride, with these pressures. Personally, I think they are to low for crisp handling and proper braking. I always run around 28-30 lbs, but that's just my preference.
That's what I'm running
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
30 psi would be fine. At less than 25 psi, your tires would be at risk for blow-outs when running at highway speeds for very long. There would be too much side-wall flexing and building heat.
Keep them at 28 psi or higher.
Keep them at 28 psi or higher.
Terrorizing Orange Cones
Joined: Oct 2007
Posts: 2,572
Likes: 17
From: Northern CO
I'm a 30 PSI kinda guy myself. The tire mftr will always print the max PSI (not to exceed) on the sidewall. That way, you can judge why some of us choose 28-30 as common numbers for a great many road conditions.
Racer
Joined: Jul 2011
Posts: 265
Likes: 77
From: chicagoland il
