Specification
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Select a vehicle to find exact fit parts
Progressive Coil Springs
Landrum Progressive Coil Springs for circle track cars give you rugged and dependable performance that’s trusted by racers nationwide.
Progressive Coil Springs for Circle Track Cars
In the 1960’s, Landrum Springs owner Robert Landrum, who was also a dirt oval racer, used his racing experience to engineer high performance racing springs that quickly became popular with local racers. As oval track racers nationwide discovered the performance advantage of Landrum Springs, the company became the go-to source for high performance racing springs.
Today, we continue to work closely with racers to deliver the best performing progressive rate coil springs. We ensure Landrum Performance Springs Progressive Coil Springs deliver the performance, durability and long-term consistency racers need to take the best set, every time.
What’s the Difference Between Progressive Coil Springs and Constant Rate Coil Springs?
While constant rate coil springs are wound to have equal spacing between the coils, coil spacing of progressive springs varies with narrow spacing at one end of the spring, and wider spacing at the other.
Constant rate coil springs compress at a linear rate, meaning rate of force needed to compress the spring a certain amount remains the same. For example, a spring with a 300 pound-per-inch linear rate (also known as the rate of deflection) will compress one inch when 300 lbs. of compression force are applied. The spring will compress another inch if an additional 300 lbs. of force is added, and so on.
With Progressive rate coil springs, the rate of deflection increases as the as the spring is compressed. The spring has a softer rate at the beginning of its range of travel. So, it can easily cushion small compression forces and shock loads. As compression forces increase the spring progresses to a higher rate to handle larger compression forces.
What’s the Benefit of Progressive Springs?
When it comes to circle track racing, the initial lower spring rate allows the suspension to smoothly take a set as the car enters a corner, and the higher spring rate comes into play as spring compression load increases when weight transfers as the car progresses through the corner.
What Metal are Landrum Springs Made With?
Landrum produces coil springs with the highest quality US made High Tensile Chrome Silicon Alloy Steel. This results in springs with superior strength, reliability, and the ability to retain their original high-performance qualities after repeated use.
Landrum Progressive Coil Spring Sizes
Diameter: 5” OD
Length: 13”
Rates:
- 125-300 lb./in.
- 150-350 lb./in.
- 175-400 lb./in.
- 200-450 lb./in.
Related products
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Landrum Street Stock/Stock Appearing Front Coil Springs are engineered for racing classes that require stock appearing front springs and don’t require use of spacers or weight jacks.
Street Stock/Stock Appearing Front Coil Springs Performance
- Listening to racers, Landrum engineers springs that deliver the performance they need.
- Our lightweight, durable, precision racing springs are made to the tightest tolerances in the industry. They’re guaranteed to hold their tolerance to 2% and we prove it with a dyno sheet included with each spring.
- Landrum Performance Springs deliver and maintain reliable and consistent performance for the high demands of stock car racing.
Precision Spring Manufacturing
- The highest grade of US made High Tensile Chrome Silicon wire is used for manufacture. This wire will maintain accurate spring rate and free length.
- Our springs are cold-wound, not hot-wound and then are properly heat-treated and stress-relieved.
Street Stock/Stock Appearing Front Coil Springs Sizes
Street Stock and Stock Appearing Front Coil Springs are available in a choice of diameters, free lengths, and spring rates to fit your application.
- 5” and 5.5” Outer Diameters
- 11” and 12” Free Lengths
- Rates of 100-1400 lbs. per inch
Additional Landrum Performance Springs technical information can be found here.
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Landrum Performance Stock Appearing Pig Tail Rear Springs are for circle track and drag racing classes that require stock appearing springs which use only one pig tail hookup and don’t require use of spacers or weight jacks.
The 5.5” OD Stock Appearing Springs are available in 9” and 11” lengths and are painted black for a stock appearance. A wide range of spring rates makes it easy to find the rate you need. Springs are closed and ground on both ends to fit stock mounting points.
Landrum Stock Appearing Pig Tail Rear Springs are built for those who demand the best spring performance and provide the reliability and durability you need to win.
If you need stock appearing double pig tail rear springs we have 14” free length springs available in a wide range of spring rates. You can see them here.
Premium Quality Materials and Manufacturing
- Landrum Performance Stock Appearing Rear Pig Tail Springs are produced with the highest quality US made High Tensile Chrome Silicon Alloy Steel Wire for strength and reliability.
- Landrum pig tail springs are cold wound, which creates steel that is stronger and harder than hot wound steel and allows for more exacting tolerances.
- Landrum springs have the tightest tolerances in the industry and are guaranteed to hold their tolerance to 2%. We prove it with a dyno sheet included with each spring.
Stock Appearing Pig Tail Rear Springs – Sizes
- 5.5” OD
- Available Free Lengths: 9” and 11”
- 9” Free Length Available Rates: 300 and 350 lbs. per inch
- 11” Free Length Available Rates: 150, 175, 200, 225, 250, 275, 300 and 350 lbs. per inch
Tip: Ford Mustang and GM metric chassis stock pig tail spring size is 5.5” OD with an 11” Free Length.
Additional Landrum Performance Springs technical information can be found here.
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Landrum Performance Front Drag Racing Coil Springs are designed to deliver the performance, reliability, and consistency you need to win. Landrum front drag race springs are taller than OEM springs and use softer rates to give your car the correct ride height while providing more stored energy for instant weight transfer during launch. This helps to give you increased torque control, reduced wheel hop, and faster 60ft and 1/4-mile ET’s.
Landrum drag race springs are available for the front suspension of GM vehicles and are offered in configurations to fit OEM A-Arms and Aftermarket A-Arms with no modifications required. Springs with a 5” outer diameter and 18” length are available for 1964-1972 GM vehicles, and springs with a 5.5” outer diameter and 18” length are offered for 1973 and newer models.
Front Drag Racing Coil Spring Rates
Our Front Drag Racing Coil Springs are available in a range of rates including:
- 150 lbs./in.
- 165 lbs./in.
- 180 lbs./in.
- 200 lbs./in.
- 225 lbs./in.
- 250 lbs./in.
Technical Information
All front springs are closed and ground on one end to provide proper contact with the frame. The opposite end is either open to properly fit into the lower control arm of OEM A-Arms or closed for Aftermarket A-Arms.
Landrum Performance Front Drag Racing Coil Springs are light weight, high travel and made with the highest-grade High Tinsel Chrome Silicon Steel wire.
The drag race springs are cold wound, not hot wound. Each is properly heat treated and stress relieved to ensure the sides of the spring remain parallel during installation.
All Landrum Front Drag Racing Coil Springs use standardized testing procedures to ensure the best quality and performance.
Our springs are powder coated and not plated which avoids hydrogen embrittlement, a condition that can be caused by electroplating and can weaken metal.
Each spring is manufactured with the highest tolerance in mind and is designed with the correct pitch and height ratio to insure a consistent rate throughout the entire cycle.
More technical and application information can be found here.
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Spring Compressor for Long Length Coil Springs
This Spring Compressor makes it easy to install our 18” Front Drag Racing Coil Springs. Standard spring compressors just aren’t long enough to properly compress 18” springs, but our spring compressor is. The spring compressor is inserted through the top shock absorber opening and a long length threaded rod allows the compressor fingers to reach down to the bottom of the spring. A position adjustable bearing located toward the top of the rod seats on the top of the shock opening so the threaded rod turns freely when the spring compressor is tensioned or loosened.
Retail Price: $169.00
To purchase a spring compressor:
- Add a spring compressor to your Front Drag Racing Coil Springs order.
- Or to purchase a spring compressor separately click here.
Download Spring Compressor Instructions:
Download “Spring-Compressor-Instructions-2.0.pdf” Spring-Compressor-Instructions-2.0.pdf – Downloaded 10005 times – 199.22 KB_______________________
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Gold Series Coil Springs are Landrum’s original high performance coil springs. Tried-and-true, Gold Series springs have been trusted by Saturday night racers for over 25 years. Using the latest materials and state-of-the-art engineering, Gold Series Coil Springs represent great performance value.
Gold Series Coil Springs are available in 5” and 5.5” OD and in a wide range of lengths and rates.
Whether used for dirt or pavement racing, superior Landrum engineering and performance lead the way.
The Best Engineering and Materials
- Using the latest spring design software, we engineer the high-performance coil springs that racers are asking for.
- Gold Series Coil Springs are manufactured at our Indiana location using the best US made high tensile chrome silicon alloy steel for strength, durability, and lightness.
Demanding Quality Control
- Tensile and compressive stiffness of the wire is verified before the coiling process.
- Springs undergo an intensive heat and press process.
- Each spring is individually tested for quality and consistent performance.
Proven Performance
Landrum high performance coil springs have the closest tolerances in the industry and are tested to be within 2% of specification. We prove it with a dyno sheet provided with each spring showing the performance of the spring as it is compressed. No other racing spring manufacturer does this.
Landrum Service
At Landrum we work with racers and chassis builders to produce the high performance coil springs they need. We take pride in providing our customers with the highest level of service and look forward to helping you with your racing spring needs.
Gold Series Coil Spring Sizes
High Performance Coil Springs – Front
- 5” OD front springs are available in 8” length with rates ranging from 400 lb./in to 1000 lb./in
- 5” OD front springs are available in 9.5” length with rates ranging from 400 lb./in to 1600 lb./in
- 5” OD front springs are available in 8.5” length with rates ranging from 400 lb./in to 1500 lb./in
- 5” OD front springs are available in 8” length with rates ranging from 400 lb./in to 1500 lb./in
High Performance Coil Springs – Rear
- 5” OD rear springs are available in 8” length with rates ranging from 125 lb./in to 450 lb./in
- 5” OD rear springs are available in 10.5” length with rates ranging from 100 lb./in to 475 lb./in
- 5” OD rear springs are available in 13” length with rates ranging from 100 lb./in to 475 lb./in
- 5” OD rear springs are available in 14” length with rates ranging from 100 lb./in to 400 lb./in
- 5” OD rear springs are available in 15” length with rates ranging from 75 lb./in to 275 lb./in
- 5” OD rear springs are available in 16” length with rates ranging from 75 lb./in to 375 lb./in
- 5” OD rear springs are available in 18” length with rates ranging from 75 lb./in to 125 lb./in
- 5” OD rear springs are available in 20” length with rates ranging from 50 lb./in to 100 lb./in
See more Landrum technical information here.