According to Kia Cars Owners Manual, the recommended tire pressures for Kia Spectra are:
Front 210 kPa (30 psi)
Rear 210 kPa (30 psi)
Spare 420 kPa (60 psi)
Each tire, including the spare, should be checked monthly when cold and inflated to the inflation pressure recommended by the vehicle manufacturer on the vehicle placard or tire inflation pressure label.
For longer tire life and better fuel economy, always keep the tires inflated to the recommended pressures. Improper wheel alignment results in faster tire wear and lower fuel economy.
Check out some tire safety tips at Michelin.