QA1 Precision Products Spring, CR-SI High Travel 2-1/2" ID 12" X 150

2 1/2" I.D. High Travel Springs

Available in 7", 9", 10", 12", 14" and 16" lengths, QA1 offers an assortment of high travel springs with a silver powder coated  finish. Made in the USA, these 2 ½" I.D. high travel springs are manufactured from specially designed high-tensile, chrome silicon alloy spring wire, which allows them to have fewer coils and a smaller wire diameter. As a result, these springs are lighter and have increased travel due to the larger distance between the coils. These lighter springs reduce unsprung weight and react faster, optimizing suspension performance.

In addition, this high-grade material, along with careful heat-treating and post-processing, allows for greatly improved fatigue life, and the coil design allows the springs to be compressed to coil-bind without affecting spring rate or free height.

These new high travel springs are silver powder coated and ground at both ends for straight, consistent and accurate operations. In addition, all QA1 springs are lifetime guaranteed to remain within 2% of the original free height and rate under normal operating conditions.

Chrome Silicon Steel
All QA1 springs are manufactured using the highest quality materials for high strength, consistency and long life.

Cold Wound - Heat Treated - Shot Peened
All QA1 springs go through intensive manufacturing processes to ensure consistency, accuracy and durability.

Squared Ends
All QA1 springs are ground at both ends to ensure straight, consistent and accurate operation.

Lengths and Rates Marked
All QA1 springs are clearly marked with the free length of the spring and spring rate for quick and easy identification.

Made in the USA
QA1's high travel springs are proudly made in the USA.

Lifetime Guarantee
All QA1 springs are lifetime guaranteed to remain within 2% of the original free height and rate under normal operating conditions.

Technical Specifications

Spring Rate Charts 

The charts below are a general guideline for selecting spring rates. Spring rates may vary depending on applications, usage and personal preference.

Average Street Rod Weight
The following charts provide general guidelines to determine the approximate weight of the most popular street rods. Of course, each car is different so it is ideal to actually weigh the front half and the rear half of your vehicle. Average car weights listed are with driver, automatic transmission, small block Chevrolet V-8, full upholstery and all normal street equipment (such as a spare tire and gas in the tank). Fiberglass cars weight the same as steel. Stripped or lightened cars will weight less. Extra passengers will add to the weight.