Specification
| Weight | N/A |
|---|---|
| Dimensions | N/A |
| Photo # | 1034 |
| Type | High Travel, INEX Legal |
Select a vehicle to find exact fit parts
Coilover Springs – Circle Track, Drag, Street, Offroad
What Makes Landrum Coilover Springs Different?
Landrum Coilover Springs are engineered for circle track, drag racing, off-road, street performance, and hot rod applications. Manufactured from high-tensile chrome silicon steel, individually dyno tested, and held to within ±2% of specification, they deliver accurate spring rates, consistent handling, predictable chassis response, and long service life.
What are High Travel Coilover Springs?
- High travel springs are designed to compress and extend further than standard springs.
- This extra travel allows for better vehicle handling and increased stability over rough terrain or during extreme driving conditions.
- Landrum springs are designed to provide consistent performance throughout their range of travel.
How Does the Material Used for Landrum Coilover Springs Affect Performance and Longevity?
- Landrum springs are manufactured with the highest-quality Chrome Silicon steel wire, which is known for its excellent fatigue resistance and high strength.
- This material offers better consistency over time, meaning the spring will continue to perform as designed, even after repeated compression and extension.
- Using Chrome Silicon steel wire ensures Landrum springs have a long service life.
What Keeps Landrum Coilover Springs from Taking a Set?
- Designed using the latest coil spring design software and state-of-the-art spring engineering methods.
- Every spring is preset to solid height during manufacturing, allowing it to be compressed to solid without taking a set and providing consistent high performance throughout its range of travel.
- Manufacturing to incredibly precise manufacturing tolerances, and using an intensive heat and press process, we ensure all our springs perform exactly as they were originally engineered.
How Do We Prove the Performance of Our Springs?
- Each Landrum spring is individually tested for quality and consistent performance.
- Every spring we manufacture must be within 2% of specification or it is scrapped. We prove it with a dyno sheet provided with each spring showing its performance as it is compressed. No other racing spring manufacturer does this.
Made in the USA
Landrum springs are proudly made at our Indiana, USA facility.
Available Coilover Spring Sizes
- 4-inch to 22-inch lengths
- 1.9-inch to 3.75-inch ID
- 50 lb./ft to 850 lb./ft spring rates
Circle Track Coilover Springs
Landrum circle track coil over springs have helped put many drivers in the winner’s circle. Including racers of oval dirt track, dirt modified, dirt late model and oval pavement cars. Landrum springs are designed to exceed the high-performance demands of racing.
Offroad Coilover Springs
High performance offroad suspensions need durable high travel springs that provide consistent performance throughout their range of travel. Landrum offroad coil over springs provide just that. Our wide variety of spring sizes and rates allow you to find exactly what you need for your off road suspension set up.
Street Performance Coilover Springs
Coilover suspension conversions for street performance cars continue to grow in popularity. Landrum makes it easy to find street performance coil over springs in the right length, ID, and rate to help your car handle and ride the way you want.
Landrum Hot Rod Coilover Springs
With hot rods, stance is what it’s all about. Landrum hot rod coil over springs are offered in sizes so you can get the stance that makes your ride look great. Our lightweight, precise, and dependable springs give you what you need.
Frequently Asked Questions About Coil Over Springs
Find answers to common questions about coil over spring selection, spring rate accuracy, free-height loss, spring life, and other performance-related topics.
How do I find the coil over spring I need?
Use the spring selector on this page to find coilover springs by inside diameter (ID), free length, and spring rate.
How do I know if my coil over spring rate is accurate?
Spring rate accuracy can be verified with a spring dyno. Because consistent performance depends on accurate spring rates, every Landrum coil over Spring is individually tested to be within ±2% of its specified rate before shipment. A dyno sheet is included with each spring to verify its measured performance throughout the spring’s range of travel.
Can Coil Over Springs Lose Free Height?
Yes, coil over springs can lose free height, also known as taking a set, when the spring steel experiences permanent deformation from stress, fatigue, or excessive loading. Common causes include:
- Material fatigue from repeated compression cycles
- Excessive loads that overstress the spring
- Frequent bottoming out or coil bind
- Poor-quality materials or manufacturing processes
To help prevent free-height loss, Landrum Coilover Springs are manufactured from high-tensile chrome silicon steel and preset during manufacturing. Presetting involves compressing the spring beyond its normal operating range to remove any initial set in the steel, helping maintain free height and allowing the springs to run at coil bind without taking a set.
How Often Should Coil Over Springs Be Replaced?
If the spring is designed and made with the proper amount of stress, as Landrum Springs are, it will last a long time without failure. Our opinion is that any spring should be replaced after 50-70 races.
Learn more about Landrum’s tight spring tolerances here
Stacking springs? See how to determine stacked spring rate here
If you need Take Up Springs, check these out
Want to know how stacking springs affects spring rate? Check out the video:
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Best Performing Quarter Midget Springs
Achieving peak performance in quarter midget racing requires precise suspension tuning. Racers depend on setups tailored to track conditions including track size, banking angles, and surface grip. They rely on lightweight, durable springs that maintain consistent performance and are available in a wide range of spring rates. Landrum Quarter Midget Springs are designed to deliver exactly that—optimal performance, durability, and reliability for every race.
What Makes Landrum Quarter Midget Springs Lightweight and Durable?
Landrum Quarter Midget Springs are crafted from US-made High Tensile Chrome Silicon Wire, known for its high strength-to-weight ratio. The wire’s unique alloy mix makes for springs that are lightweight yet exceptionally strong, ensuring superior performance without adding unnecessary mass.
What Are the Available Spring Rates for Quarter Midget Springs?
Quarter midgets depend on finely tuned suspension setups due to their lightweight and sensitivity to track conditions. Choosing the right spring rate for track surface, driver weight, and handling characteristics is essential for optimal performance. To achieve consistent and predictable handling across varying racing conditions, racers need a wide and precise range of spring rate increments.
Landrum Quarter Midget Springs meet this need by offering 4”, 4.5″ and 5” lengths, with rates from 75 lbs./in to 125 lbs./in in 5 lb. increments and with no tolerance overlap. Providing spring rate options for consistent suspension tuning across a variety of conditions.Important Note About Spring Color
Please note, Landrum Quarter Midget Springs in 4“ and 5” lengths are Gun Metal Grey in color and 4.5” length are Flat Black in color.
How Do I Know If My Quarter Midget Springs Have the Right Spring Rate?
For 1/4 midget racing, accurate spring rates without tolerance overlap are essential, making it crucial to know the exact spring rate. Each Landrum Quarter Midget Spring is rigorously tested to ensure it meets its rate specification within a ±2% tolerance and maintains that performance throughout its range of travel. A dyno sheet is included with every spring, documenting its test results to guarantee you receive the exact performance you’re expecting.
Why Is Spring Consistency Important in Quarter Midget Racing?
Racers look for consistency and repeatability; ¼ midget springs that can take repeated compression and rebound cycles without losing performance or free height. Landrum manufactures springs to meet these high-performance standards. Landrum Quarter Midget Springs are cold wound, not hot wound, and undergo precise heat treatment and stress relief for high durability. Preset to solid height during production, these springs can be fully compressed repeatedly without losing performance or free height, ensuring consistent performance throughout their range of travel. This design allows them to reach coil bind without taking a set, providing long-lasting, reliable performance even under extreme conditions.
Proudly Made in the USA
Since 1966, Landrum Performance Springs has been providing racers with race winning high performance springs for racing. Using only the best US sourced High Tensile Chrome Silicon Spring Wire, Landrum springs are expertly produced at our Indiana location.
FAQ
1. What should I look for in a spring for a quarter midget race car?
Look for springs that offer consistency, durability, and precise rate control. Because quarter midgets are lightweight and highly sensitive to setup changes, even small spring differences can impact performance.
2. How important is spring rate in quarter midget racing?
Extremely important. The right spring rate affects handling balance, corner entry and exit, and tire grip. Racers often adjust spring rates to suit different track conditions, driver weight, and driving style.
3. Why is consistency important for quarter midget springs?
Racers rely on springs that maintain consistent performance through repeated compression and rebound cycles. Consistency ensures predictable handling and repeatability, critical for achieving optimal race results.
4. What does “preset to solid height” mean for Landrum springs?
Landrum Quarter Midget Springs are preset to solid height during production, which allows them to be fully compressed without losing free height, ensuring consistent performance throughout their full range of travel.
5. What material are Landrum Quarter Midget Springs made from?
Landrum Quarter Midget Springs are crafted from US-made High Tensile Chrome Silicon Wire, which is known for its excellent strength-to-weight ratio.
6. What sizes do Landrum Quarter Midget Springs come in?
Landrum offers Quarter Midget Springs in two height options: 4” and 5”.
7. How does Landrum ensure the accuracy of its quarter midget springs?
Each Landrum quarter midget spring is rigorously tested to meet its specified rate within a ±2% tolerance. This ensures that the spring performs exactly as expected throughout its range of travel.
Landrum Quarter Midget Springs specifications can be found here
See the Landrum Difference
Whether it’s maintaining consistent rates throughout the full range of travel or ensuring quick recovery over bumps, Landrum Quarter Midget Springs are designed to deliver consistency, durability and performance lap after lap.
Check out this video for a Quarter Midget Springs overview.
Important Note About Spring Color
Please note, Landrum Quarter Midget Springs in 4“ and 5” lengths are Gun Metal Grey in color and 4.5” length are Flat Black in color.
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Landrum Progressive Coil Over Springs provide the reliable and consistent high performance you need to win.
What Are Progressive Coil Over Springs?
Progressive springs provide a varying spring rate throughout their range of travel. The initial spring rate is low but progressively increases as the spring is compressed. The springs are commonly used in circle track racing applications to help control body roll when cornering.
How Do Progressive Rate Coil Over Springs Work?
Progressive rate coil over springs are produced with varying coil spacing. At one end of the spring the coils are narrow spaced and as the coils progress to the other end of the spring the spacing becomes wider.
When the spring is minimally compressed all coils of the spring are active and a lower spring rate is in effect. As the spring is further compressed, such as when a car takes a set as it enters a corner, the narrow-spaced coils collapse on top of each other until they touch, which is also known as “going solid”. When this happens the number of active coils of the spring is reduced, which results in a higher spring rate.
What Type of Steel is Used for Progressive Coil Over Springs?
We manufacture our progressive coil over springs using the highest quality US made High Tensile Chrome Silicon Alloy Steel for strength, reliability, and to maintain their original high-performance characteristics after repeated use.
Landrum Race Proven Performance
Since 1966, Landrum Performance Springs have helped put racers in victory lane. Racers and crew chiefs trust Landrum for the best spring performance.
Progressive Coil Over Spring Sizes
- 2.5” ID
- 10”, 12”, 14” and 16” Lengths
- Rates:
- 175-350 lb./in.
- 140-375 lb./in.
- 200-400 lb./in.
- 250-400 lb./in.
Learn more about how Landrum Springs are designed and manufactured here.
Watch this video to see how Progressive springs work:
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Landrum Performance Conical Coil Over Springs taper from a 5.0” OD to a 2.5” ID to prevent bowing that can occur with long and slender coil over springs. Using the proper hardware, the high travel, low-rate conical spring can be used as coil-over springs or conventional mount springs.
Durable and consistent Landrum Performance conical coil springs are designed for circle track, dirt late model, and pavement late model cars.
Advantages of Conical Coil Over Springs
- The conical spring shape provides greater lateral stability to avoid lateral deflection.
- Conical coil springs allow more precise control of spring deflection.
- When compressed the tapered spring coils fit into the other (coil telescoping). This decreases solid height at full compression to provide a higher range of travel.
- The linear spring rate from free length to solid height provides a more usable range of deflection.
- Spring can be flipped to use the 2.5″ OD end where the 5″ OD end won’t fit
- Lighter weight than non-tapered suspension springs.
Landrum Quality
- Produced with the highest quality US made High Tensile Chrome Silicon wire.
- Manufactured to the tightest tolerances in the industry and guaranteed to hold their tolerance to 2%. We prove it with a dyno sheet included with each spring.
- Durable
Conical Coil Over Spring Sizes
- Free Length: 18”
- 5.0” OD and 2.5” ID
- Available Rates: 50, 75, and 100 lbs. per inch
Additional Landrum Performance Springs technical information can be found here.
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What are Coil Over Barrel Springs?
Landrum Coil Over Barrel Springs avoid the bending and bowing issues associated with long length coil over springs.
- Coil Over Barrel Springs use a barrel shape design to prevent bowing when they’re compressed. Thereby maintaining spring performance and avoiding contact with the shock.
- High travel coil over springs with lengths more than four times their width tend to bow when compressed.
- The longer the spring the more it can bow, causing spring rate inconsistency and damage to shocks if contact is made.
How Do Coil Over Barrel Springs Prevent Bowing?
- The barrel shape of our Coil Over Barrel Springs allows even stress distribution across the length of the spring, which provides lateral stability. Making the springs less prone to bending or bowing sideways during compression.
What Are the Advantages of Coil Over Barrel Springs?
- Provide more consistent and controlled weight transfer during cornering and acceleration. Keeping tires in the best contact with the surface.
- Increased spring travel before coil bind.
- Lateral stability keeps the spring properly seated.
- Avoiding bending or bowing keeps the spring from rubbing against the shock body, which could damage the threads of the shock adjusting perch.
- The barrel shape allows for efficient use of materials.
- By tapering the spring, it can be designed to be both lightweight and structurally sound.
Landrum Materials and Engineering
- Manufactured with only the best grade of high tensile chrome silicon alloy steel for strength, durability, and lightness.
- Designed using the latest spring design software and state-of-the-art engineering technology.
Landrum Quality Control Processes
- Tensile and compressive stiffness of the wire is checked before the coiling process.
- Springs undergo an intensive heat and press process.
- Each spring is individually tested for quality and consistent performance.
Dyno Sheet
- Every Landrum coil over spring comes with a dyno sheet that shows the dynamic rate and force output of the spring in 0.200” increments. This allows you to know exactly what the spring rate is and means when you change a spring, you know exactly what change is being made. No other manufacturer does this.
Learn more about Landrum’s tight spring tolerances here
What Coil Over Barrel Spring Sizes are Available?
- 5” ID x 11” length available with rates of 125 lb./in to 600 lb./in
- 5” ID x 12” length available with rates of 100 lb./in to 350 lb./in
- 5” ID x 13” length available with rates of 125 lb./in to 350 lb./in
- 5” ID x 14” length available with rates of 125 lb./in to 275 lb./in
- 5” ID x 15” length available with rates of 80 lb./in to 100 lb./in
- 5” ID x 16” length available with rates of 105 lb./in to 135 lb./in
More Landrum technical information available here.