This QA1 high travel coil-over spring has a 2 inch inside diameter, a 10 inch free length, and a variable 140/250 lb/in rate for progressive response. It is wound from high-tensile chrome silicon alloy spring wire, which allows fewer coils and a smaller wire diameter, so the spring is lighter and offers more travel from the greater distance between coils. The reduced unsprung weight helps the suspension react faster. Careful heat treating, shot peening, and post-processing improve fatigue life, and the coil design lets the spring compress to coil bind without affecting rate or free height. Both ends are ground square for straight, consistent operation, and the silver powder coated finish adds durability. QA1 guarantees its springs for life to stay within 2 percent of their original free height and rate under normal operating conditions.
Specifications:
- Type: Variable rate high travel coil-over spring
- Inside diameter: 2 in
- Free length: 10 in
- Spring rate: 140/250 lb/in (variable rate)
- Material: High-tensile chrome silicon alloy steel
- Finish: Silver powder coat
- Ends: Ground square
- Lifetime guarantee to stay within 2 percent of original free height and rate
- Made in the USA
- Part number: 10HT140/250
FAQ
What are the dimensions and rate of QA1 spring 10HT140/250?
It has a 2 inch inside diameter, a 10 inch free length, and a variable 140/250 lb/in rate.
What does a variable rate spring do?
A variable rate spring changes its effective rate through the stroke, here from 140 to 250 lb/in, for a progressive response that stays compliant early and firms up under load.
What is the spring made from?
It is wound from high-tensile chrome silicon alloy spring wire, then heat treated and shot peened for fatigue life, and finished in silver powder coat.
Is this spring covered by a warranty?
Yes. QA1 guarantees the spring for life to remain within 2 percent of its original free height and rate under normal operating conditions.
