Coil Spring - 2.5in x 9 250#

The QA1 Coil Spring – 2.5in x 9 250# (part number 9HT250) is a high-travel coil-over suspension spring engineered for performance-oriented vehicles requiring precise spring rate control and extended compression travel. With a 250 lb/in spring rate, 2.5-inch inner diameter, and 9-inch free length, this steel spring delivers the progressive load characteristics necessary for handling both street and track applications where consistent ride height and suspension geometry must be maintained across varied driving conditions.

The 250-pound spring rate is mid-range for coil-over applications, offering a balance between ride comfort and responsive handling without requiring excessive damping to control body motion. The 9-inch length accommodates full-range coil-over shocks with adequate clearance and travel capacity. Silver powder-coat finish provides corrosion resistance and durability against road salts, moisture, and thermal cycling encountered in daily or seasonal use. At 2.65 pounds, this spring integrates seamlessly into multi-stage suspension builds without adding excessive unsprung weight that would compromise ride quality or brake performance.

Buyers selecting a 250# coil spring are typically building custom or performance suspension systems where OEM springs no longer meet their requirements—whether for track day preparation, off-road articulation, lowered street builds, or motorsport competition. QA1 springs are manufactured to tight tolerances, ensuring consistent rate across the compression range and reliable pairing with matching dampers. This spring ships as a single unit; suspension builds typically require two springs (front and rear) or four springs (one per corner) depending on vehicle configuration.

Coil-over suspension allows independent tuning of spring rate, ride height, and damping, making it the platform of choice for enthusiasts who prioritize handling refinement over comfort. The QA1 250# spring is one data point in a wider range of QA1 rates available, so builders can select stiffness that matches their weight distribution, driving style, and vehicle dynamics goals.