Truck Tarp System for trucks & trailers


The trucking industry depends on high-quality springs for optimal safety and efficiency. At John Evans’ Sons, we have more than five decades of experience producing spiral torsion springs for truck and trailer tarp systems. Our highly reliable spring designs and manufacturing expertise ensure rugged, field-proven assemblies.

In addition to spiral torsion springs, we also support the trucking industry with quality motor brush springs. These springs are critical components in electric motors, providing consistent contact between the brushes and the commutator for smooth operation. 


Spiral Torsion Springs for Truck Tarp Systems

Spiral torsion springs, or tarp springs, are wound in a concentric circle, with the torque curve being linear to the degree of rotation. This unique design allows tarp springs to store more mechanical energy compared to compression, extension, and other helical springs. Their ability to provide significant amounts of torque in a short rotation makes them critical in various motion applications, including truck tarp systems.  

How Spiral Torsion Tarp Springs Work

A spiral torsion tarp spring stores and releases rotational energy. Within a truck tarp system, these springs are housed in the base of the tarp arm and are activated when the tarp is being rolled up. A bent tab in the middle of the spring latches onto the tarp system pivot pin, while the spring’s tail latches onto a ledge or rod in the tarp arm. As the tarp rolls up, the tarp arms push against the spring’s tail, resulting in a build up of tension.

Tarp Spring Applications

Tarp springs from John Evans’ Sons can be used in a wide range of applications, including:

  • Flatbed tarps and specialty tarp systems for secure cargo covering
  • Dump truck tarp springs for side roll, flip tarp, and cable tarp systems
  • Roll-off truck tarp systems for numerous truck types
  • Pull tarp systems for smaller dump trucks

Why Tarp Spring Selection Matters

Choosing the right tarp spring is key to ensuring the longevity, durability, and reliability of your truck’s tarp system. As an industry-leading provider of custom spiral torsion tarp springs, we can deliver a tailored solution that meets your unique needs. 

Utilizing materials such as carbon steel, specialty alloys, and stainless steel, our tarp springs can provide significant torque with minimal rotation. This makes them integral to the functionality and efficiency of truck tarp systems.


John Evans’ Manufacturing Excellence

At John Evans’ Sons, we have extensive experience manufacturing superior-quality spiral torsion springs to meet the needs of the trucking industry. We are committed to providing outstanding customer service and strive to continually improve our processes to ensure our products deliver optimal performance.

We can customize tarp springs to accommodate any specification or configuration required, including tabs, hooks, fasteners, holes, and more. We also offer a wide range of tarp spring mounting options to provide ideal results for numerous settings. If you’re not sure which tarp spring solution is right for you, our technical support team is available to guide you through the entire process.


Trucking Tarp Springs from John Evans’ Sons, Inc.

Spiral torsion springs play a critical role in truck tarp systems. By partnering with a spring expert like John Evans’ Sons, you can be sure you’re receiving the highest quality tarp springs for your application. Our tarp springs are constructed from durable materials and deliver long-lasting performance in a wide variety of tarp system applications. For more information about our trucking tarp springs, or to get started on your customized solution, contact us or request a quote today. 


Need Assistance? Consult our Technical Team.

Our Technical Team offer a depth of expertise to assist you with all parts of the process. We are ready to answer your questions in a timely manner and will help you define what you need. We produce custom springs for all purposes, and we are here to work with you on any of your customization needs.