Specification
| Weight | N/A |
|---|---|
| Dimensions | N/A |
| Photo # | Conical-Spring Photo |
Select a vehicle to find exact fit parts
Conical Coil Over Springs
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.
- 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.
Related products
-
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:
-
Landrum Coil Over Barrel Springs avoid the bending and bowing issues associated with long length coil over springs.
High travel coil over springs with lengths more than 4 times their width have a tendency to bow when compressed. The greater the length of the spring, the more it can bow. Causing spring rate inconsistency, and possibly cause damage to shocks if they make contact. Our Coil Over Barrel Springs use a barrel shape design to prevent bowing when they’re compressed. Thereby maintaining spring performance.
How Do Coil Over Barrel Springs Prevent Bowing?
- The conical shape of our Coil Over Barrel Springs allows more 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.
The Best 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.
Intensive 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 Performance Coil 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
Coil Over Barrel Spring Sizes
- 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.
-
Landrum Dirt Late Model Coil Over Springs give you the winning edge.
What are Dirt Late Model Coil Over Springs?
Landrum Dirt Late Model Coil Over Springs are engineered for maximum travel, clearance, coil spacing and lightness to meet and exceed the extreme demands of Dirt Late Model racing. Our springs provide the performance, durability and consistency needed to win.
Coil over springs that don’t take a set
- Preset to solid height during manufacture, allowing them to be compressed to solid during use while providing consistent performance throughout their range of travel.
- Dirt Late Model Coil Over Springs are built to operate at maximum stress levels without losing free height. So, they’re able to go to coil bind and not take a set.
Proven dirt late model coil over springs performance
Landrum 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.
Top quality 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.
Intensive 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.
Dirt late model coil over spring sizes
- Dirt Late Model Coil Over Springs have 2.5” ID and are available in many different length and rate combinations.
Conical and progressive coil over springs for dirt late model cars
Landrum offers other springs for dirt late model cars:
Want to know how stacking springs affects spring rate? Check out the video:
-
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.