Tein SKG10-AUB00 S.Tech Lowering Spring for Chrysler PT Cruiser Front spring rate: 3.2 kilogram per millimeter (179 pounds per inch) Rear spring rate: 2.9 kilogram per millimeter (710 pounds per inch) Front ride height: -33 millimeter (-1.3 inch) Rear ride height: -50 millimeter (-2 inch) Progressive spring rate design