The Topeak MTX Trunk Bag DXP is a premium cycling trunk bag designed for durability, expandability, and ease of use. This comprehensive review delves into its key features and performance, exploring why it's a top contender for cyclists seeking a versatile and reliable solution for carrying gear on their rides. From its robust construction and weather-resistant materials to its seamless integration with the MTX QuickTrack system, we'll examine every aspect of this high-capacity bag.We'll explore the DXP's impressive storage capacity, facilitated by its expandable design, and showcase its convenient accessories. These include a detachable shoulder strap, a water bottle holder, a rear safety light clip, and reflective strips for enhanced visibility and safety. We’ll also assess the bag’s organizational features and analyze its overall value proposition, considering its price point and comparison to competing products. Read on to find out if the Topeak MTX Trunk Bag DXP is the perfect fit for your cycling needs.
Pros And Cons
- Durable and weather-resistant 600 denier polyester construction with molded EVA foam insulation.
- Easy to secure onto MTX quick track system.
- Expanding top and side panels that expand to full panniers.
- Includes a shoulder strap.
- Features a water bottle holder.
- Has a rear safety light clip.
- Includes reflective 3M strips.
- Has an adjustable bungee cord on top.
- Padded Velcro handles.
- Divided main compartment.
- Expandable top.
- Two side panels with expandable panniers.
- Offers 1380 cubic inches of storage.
- Measures 14.5 x 8.5 x 9.8 inches (width x height x depth).
Read more: 5 Must-Have Cycling Frame Bags
Durable Construction and Easy Mounting
The Topeak MTX Trunk Bag DXP boasts a durable and weather-resistant construction, utilizing 600 denier polyester with molded EVA foam insulation. This ensures your gear stays protected from the elements, even during harsh conditions. Its standout feature is the seamless integration with the MTX QuickTrack system. Simply slide the bag onto any compatible MTX rack for effortless mounting and removal.

The robust materials offer excellent protection against bumps and scrapes while the quick-release system makes the bag highly convenient for frequent use. This is a big plus for cyclists who regularly need to access their gear on the go.

Spacious Storage and Expandability
One of the key features of this trunk bag is its impressive storage capacity. The expandable top and side panels transform the bag into full panniers, accommodating all your belongings for extended trips. This adaptability is a game changer for those who need extra space for gear or groceries.

Whether you are heading out on a multi-day adventure or simply running errands, the DXP provides the flexibility to handle varying levels of cargo. Its intelligent design and well-thought-out expansion mechanism make the bag both practical and convenient to use.

Convenient Features for Enhanced Cycling
The Topeak MTX Trunk Bag DXP stands out with its thoughtful accessories designed to enhance your cycling experience. A detachable shoulder strap facilitates easy carrying when off the bike. A water bottle holder on the back caters to hydration needs during longer rides.


It also offers a rear safety light clip for increased visibility in low-light conditions and reflective 3M strips improve your safety further. These well-integrated features significantly increase both functionality and safety.


Additional Features and Specifications
The Topeak MTX Trunk Bag DXP’s thoughtful design doesn’t end there. It features an adjustable bungee cord on top for securing additional items, padded Velcro handles for easy on and off the bike, and a divided main compartment for improved organization. This ensures your belongings remain secure and easily accessible.


The bag offers impressive storage with 1380 cubic inches (22.6 liters) and dimensions of 14.5 x 8.5 x 9.8 inches (W x H x D). It’s constructed from durable 600 denier polyester with rigid molded side panels for added support and structure. The expandable design makes the bag incredibly versatile for various riding situations.


Conclusion: Is the Topeak MTX Trunk Bag DXP Worth It?
The Topeak MTX Trunk Bag DXP is a high-quality trunk bag that combines durability, expandability, and practical features. Its robust construction, easy mounting system, ample storage capacity, and well-designed accessories make it a compelling choice for cyclists of all types. The combination of weather resistance and expansion capabilities ensures you can take it on any adventure.

While the price may be slightly higher than some competitors, the added features such as the water bottle holder, safety light clip, and thoughtful storage solutions justify the cost. If you need a reliable and versatile trunk bag that can handle anything you throw at it, the Topeak MTX Trunk Bag DXP is a top contender.