There is no single expansion height because it depends on several factors, including your truck's bed length, bed width, the location of the cargo within the bed, and the shape of the load itself.

In general, larger truck beds provide more available material, allowing the Sawtooth STRETCH ACMS to expand higher and cover taller cargo than smaller truck beds. Cargo positioned near the center of the bed typically allows for greater vertical expansion than cargo located near the cab, tailgate, or bed rails.

Because every truck and cargo configuration is different, the maximum expansion height will vary.

No. Sawtooth is an Adaptive Cargo Management System (ACMS), not a truck bed cover or Tonneau Cover. Truck Bed Covers and Tonneau covers are static, flat systems that must be removed when cargo exceeds bed height. Sawtooth creates an adjustable cargo enclosure that expands above the bed rails to secure oversized loads, then retracts out of the way when not needed. It operates more like a flexible truck cap, providing variable storage capacity instead of a fixed cover.

No. That is one of the biggest differences between the Sawtooth STRETCH and a traditional flat tonneau cover.

Most traditional truck bed covers are designed to remain flat across the top of the bed. When cargo extends above the bed rails, the cover typically has to be opened, folded, rolled, retracted, or removed.

The Sawtooth STRETCH is different. Its flexible composite material expands upward and around tall, oversized, and irregularly shaped cargo. This allows you to keep your cargo covered while using significantly more of the available space above the truck bed.

When the oversized cargo is removed, the STRETCH returns to its normal low-profile configuration.

This adaptability is why Sawtooth refers to the STRETCH as an Adaptive Cargo Management System, or ACMS, rather than a conventional tonneau cover.

No. The Sawtooth STRETCH was designed to preserve as much usable truck-bed space as possible.

Unlike retractable tonneau covers that may require a large storage canister inside the front of the truck bed, the Sawtooth STRETCH does not require a bulky enclosure that occupies a significant portion of the bed.

Its low-profile rail system mounts along the bed, while the removable cross-support bows span the bed above the cargo area.

More importantly, the STRETCH can expand above the bed rails when needed. Instead of limiting you to the space below a flat tonneau cover, it allows you to use substantially more of the truck's available cargo volume.

Yes. The Sawtooth STRETCH was specifically designed to let you make greater use of your truck bed without removing the system every time your cargo changes.

For smaller loads, the STRETCH operates in its normal low-profile position. For taller or irregular cargo, the composite material can expand upward and around the load.

This gives you the flexibility of a truck bed cover when you want a low-profile enclosure, while still allowing you to carry cargo that extends above the bed rails.

You do not have to choose between having a cover installed and being able to haul oversized cargo.

Sawtooth is designed to secure and conceal your gear across a wide range of cargo sizes. Its reinforced composite material helps deter tampering while keeping contents out of sight. Unlike a truck bed cover that only protects low-profile loads, Sawtooth expands to fully enclose and secure tall or irregular cargo. While it is not a rigid shell, it provides strong, real-world security with far greater versatility.

Sawtooth is designed to be highly water-resistant and to protect your cargo in real-world conditions. Its tensioned design and integrated cross-support bows help shed water, snow, and debris while minimizing pooling. In heavy rain or extreme conditions, some moisture may still enter the bed, as with any soft system. For added protection, applying 303 Aerospace Protectant helps enhance water resistance and improves water shedding performance.

No. Sawtooth is designed to enclose and secure cargo, not support weight on top. The cross-support structure is engineered to maintain shape and tension, not to carry loads. Placing items on top may damage the system and is not recommended.

Sawtooth does not use a built-in locking mechanism by design. Its focus is fast use, flexibility, and the ability to adapt to changing cargo. When paired with a locking tailgate, it still helps keep gear secured and out of sight, while avoiding the added complexity and limitations that come with fixed locking systems.

Every Sawtooth ACMS comes with easily removable cross bars that bow up to help guide water off the composite material.  In some instances you may get pooling but simply driving your pickup will shed that water off your STRETCH.  To help limit water entering through the composite material we included cross support bows that slide into sleeves mounted under the composite material which help minimize this.  Finally, regularly using 303 Aerospace Protectant helps to eliminate water absorption and to shed water and snow from the ACMS.

Your Sawtooth STRETCH is designed to handle cold snowy winters. Sawtooth ACMS was developed at high elevations in the Rocky Mountains to handle extreme cold and snow loads. Each ACMS has easily removable cross bars that keep snow from “sagging’ the composite material downward when no cargo is under the ACMS. Please note, all materials that are exposed to extremely cold temperatures naturally become more rigid. Your Sawtooth too will become more rigid during extreme cold temperatures. During extreme cold temperatures, the Sawtooth STRETCH will be somewhat limited in flexibility and may require extra pull strength and patience while the ACMS stretches and hooks to the rail frame under load conditions.

Sawtooth does not use a traditional lock-and-key system. Instead, it secures cargo through direct contact and tension, stretching tightly around your load to hold it in place and prevent shifting during transport. This approach keeps gear contained, covered, and out of sight while maintaining the flexibility to handle a wide range of cargo sizes.

Under heavy snow or significant water buildup, some temporary sagging may occur. Sawtooth is designed with integrated cross-support bows that maintain tension and help minimize sagging while promoting water and snow runoff. Applying a fabric protectant like 303 Aerospace Protectant further enhances water shedding and overall performance.

Yes. Sawtooth is designed for direct contact with cargo, using a durable, flexible composite that stretches to conform around your load while maintaining tension and coverage. This allows it to secure a wide range of cargo sizes and shapes.
Avoid sharp or jagged edges that could snag or damage the material. When needed, pad or reposition items to protect the system and ensure long-term performance.

We believe a durable product should also be repairable.

The Sawtooth STRETCH was designed as a serviceable system with many individually replaceable components. If a component becomes worn or damaged, the goal is to replace the affected component rather than discard an otherwise functional system.

Many conventional tonneau covers use integrated assemblies that can make individual components difficult or impractical to replace. Depending on the design and manufacturer, damage to one portion of the cover can require replacement of a much larger assembly.

Sawtooth takes a different approach. Components such as rails, clamps, bows, buckles, hardware, and even the composite cover can be serviced or replaced individually when appropriate.

This approach can extend the useful life of the Sawtooth STRETCH and reduce unnecessary replacement of components that are still functioning properly.