King Springs Replacement Leaf Springs
September 19, 2018
King Springs Single Ended Tapered
September 19, 2018

King Springs Linear Rate Competition Springs


  • KING SPRINGS are manufactured from quality BHP Steel.
  • All springs are manufactured under quality control ISO 9002.

The Intelligent Coil Spring 
Progressive rate springs are the ultimate in spring design. The principle is simple. The spring rate increases when you need it (cornering load carrying etc) and decreases when you don’t. The science being over what suspension travel and to what degree the spring rate will increase. This varies greatly between vehicles. Referring to the above three considerations with King performance progressive rate springs a substantial spring rate increase is achieved with minimal loss of ride comfort as the spring rate increases and decreases where necessary. As the spring derates (the spring rate decreases) the shock absorber no longer struggles for rebound control and gives improved vehicle stability. With King performance progressive rate coil springs, spring entrapment problems are now often solved with substantial spring rate increases and ride height decreases available, with the added advantage of not requiring a shorter shock absorber in most cases.

Progressive Rate Design Principles: 
Remembering the principle, the less coils in a spring, the higher the spring rate, as the spring compresses under load the gathered coils come into contact and become inactive thus increasing the spring rate. The point at which each coil comes into contact and the rate of increase is the result of extensive research, development and testing on advanced testing equipment.

LINEAR Rate Competition Springs 
Free Height X Internal Diameter X Rate [lb/in]
140 x 60 x 400lbs – 1900lbs
200 x 60 x 200lbs – 1000lbs
250 x 60 x 200lbs – 800lbs
180 x 65 x 175lbs – 1600lbs
200 x 65 x 175lbs – 1500lbs
250 x 65 x 150lbs – 1000lbs
250 x 65 x 200lbs – 500lbs
350 x 65 x 150lbs – 600lbs
150 x 65 x 500lbs – 1200lbs
300 x 65 x 150lbs – 1000lbs
170 x 60 x 200lbs – 1000lbs

• High Quality Coil Over type Springs.
• Specifically designed & manufactured for Motorsport & Performance Street Car applications.
• Linear & tapered wire progressive rate springs, flat section tender springs and spacers.

King Springs Pro-Sport is a range of high quality coil over type springs specifically designed and manufactured for motor sport and performance streetcar application. The range includes both linear and tapered wire progressive rate springs as well as fl at section tender springs and has been developed from many successful years of expertise in the motor sport industry.

King Springs is Australia’s leading manufacturer of springs. King Springs are found on most leading cars in every facet of motor sport including race, rally and off-road. At the forefront of Kings motor sport involvement are Kings tapered wire progressive rate springs which have gained a worldwide reputation.