Your stuck on door sticker for a tire size and speed rating that no longer exists on either car…
The OEM tires on the Saturn were 185/65R15 with 30 front / 26 rear, with 35 PSI max, “T“ speed rated…
Current 51 PSI max, 205/60R15, “H” speed rating.
Put 26 in the rear on the current tires, this is reckless, and dangerous.
I do inflate hard for mileage and tire wear, 32f / 40r would be my normal pressure
Typical load ratings
185/65R15 T = 88
205/60R15 H = 91
Load ratings are established at 35 (US) or 36 (Euro) psi for standard load tires as are the speed ratings. The maximum allowed cold inflation pressure is for special circumstances and to allow vehicle manufacturers to make handling adjustments.
The new tires should ideally have a lower pressure not higher because of increased load rating at the same pressure. However the minimum inflation pressure has been set at 26 psi for radial tires so the factory pressures are the best he can do while attempting to maintain factory handling bias. Running excessive rear pressure can be dangerous because it effectively increases rear spring rate possibly causing oversteer (rear of car losing traction first) in an emergency maneuver.
If you choose to run more pressure than oem attempt to keep the bias similar. Say 40 psi front and 35 psi rear to keep the handling bias more toward design unless you have experience adjusting handling bias and a safe place to test breakaway characteristics. Be aware that this may reduce the vehicles cornering limits and increase braking distance.
Note: Tire manufactures are currently bringing uniformity to the tire rating system so all standard load tires are going to 36 psi for the max load rating as they are redesigned.
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