Ride Height
 

I have a copy of the AIM specs. My question is about the tire pressure of 24 psi and radial tires. If I recall correctly,bias ply tires had stiffer sidewalls and would stand closer to 26.9 inches tall than a radial with a similarly rated height.

The AIM calls for a measurement of 28.0 at the center of the wheel well arc with the bias ply tires. Should I compensate for the difference in radial tire height by reducing the wheel well arc height? IOW since the specs call for a tire height of 26.9 and wheel well height of 28.0, should the difference for a radial tire height and wheel well height be 1 inch regardless of the AIM spec?

Radial tires need to be aired-up to around 30 psi. 24 psi on radial tires is WAY low. GM found that out in the mid-70's when they spec'ed their radial tires in the mid-20 psi range. Folks had LOTS of high speed blow-outs because of excessive sidewall flexing and heating.

The diameter of 215R70-15 tires is about the same as the stock F70-15 tires. It is also very close to the 235R60-15 diameter.

No, this is not for NCRS just setting ride height. I have the 215/70 15 tires on it now. The tire height is about 26 inches with a full tank of fuel and the wheel well arc height is 27 15/16. It is within the AIM specs but just doesn't look quit right. I will recheck the tire pressure adjust accordingly. I just may have to live with it.

Thanks for your reply.

I would set the tire pressure correctly, then lower the ride height to where it looks good, pay no attention to the AIM on this one