Bontrager Adventure Top Tube Bag Review: A Viable Saddle Bag Replacement?

This review explores the Bontrager Adventure Top Tube Bag as a potential replacement for a traditional saddle bag, driven by the need for improved Garmin Varia radar placement. The author's initial setup, with the radar mounted on a saddle bag, proved inefficient and hampered the radar's functionality. Seeking a solution, the 1.6-liter Bontrager bag offered an intriguing alternative, especially considering the challenges of mounting the radar with a rear rack. The review details the author's experiment, transferring the contents of their saddle bag—including a spare tube, tools, and supplies—into the top tube bag to assess its practicality and capacity.The core question addressed is whether the Bontrager bag can effectively replace the saddle bag as a storage solution for essential cycling gear. The review examines the challenges of fitting various items into the relatively compact top tube bag, assessing the overall stability and security of the contents during a ride. Ultimately, it evaluates the trade-offs between space limitations and the aerodynamic advantages of a top tube bag over a traditional saddle bag, concluding with an assessment of its viability as a practical and convenient alternative for many cyclists.

Pros And Cons

Bontrager Adventure Top Tube Bag
  • Fits a spare tube, energy tabs, multi-tool, tire levers, money, small tools, and a tire patch.
  • Provides easy access to essential items.
  • More aerodynamic than a saddlebag.
  • Securely attaches with Velcro.
  • Items need to be tightly packed.
  • Slight movement of the bag when riding; leg might hit it.
  • Bag is slightly tilted to one side.

Read more: 5 Must-Have Cycling Frame Bags

The Problem: Saddle Bag Limitations

Mounting my Garmin Varia radar to the back of my saddle presented challenges. With a rear rack, mounting was difficult. The biggest issue was using a saddle bag which forced the radar onto a small bracket, resulting in a downward-facing, inefficient position.

The speaker shows the difficulty in mounting the Garmin Varia radar on the back of the saddle.
The speaker shows the difficulty in mounting the Garmin Varia radar on the back of the saddle.

This poor radar placement significantly hampered its functionality, making it frustrating for safe cycling. That's why I sought an alternative solution.

The speaker points out the issues of mounting the radar with a saddle bag.
The speaker points out the issues of mounting the radar with a saddle bag.

Introducing the Bontrager Adventure Top Tube Bag

The Bontrager Adventure Top Tube Bag, with its 1.6-liter capacity, seemed like a potential solution. I purchased it at my local bike shop for around $39 MSRP.

Close-up of the Bontrager Adventure Top Tube Bag.
Close-up of the Bontrager Adventure Top Tube Bag.

I also considered the smaller Aerial Wedge, priced at about $24 with around a 1-liter capacity. However, I decided to test the Bontrager bag's ability to replace my saddle bag entirely.

The speaker mentions the price of the Bontrager bag and the Aerial Wedge.
The speaker mentions the price of the Bontrager bag and the Aerial Wedge.

Capacity Test: From Saddle Bag to Top Tube Bag

My saddle bag contained a surprising amount of items: a spare tube, energy bars, multi-tool, tire levers, money, small tools, and a tire patch.

The contents of the saddle bag are shown.
The contents of the saddle bag are shown.

The goal was to transfer everything from the saddle bag to the Bontrager top tube bag to assess its practicality and functionality as a replacement.

All items are removed from the saddle bag, ready to be transferred.
All items are removed from the saddle bag, ready to be transferred.

Fit and Function: A Tight Squeeze

Fitting everything into the top tube bag proved challenging. The long, narrow spare tube was the biggest obstacle, requiring me to carefully compact everything into the available space.

Items are being placed into the Bontrager Top Tube Bag.
Items are being placed into the Bontrager Top Tube Bag.

Despite the tight fit, I managed to get everything in and secure it with the Velcro closure. While some minor shifting occurred, the overall stability was surprisingly good.

The bag is closed, showing the compactness of the contents.
The bag is closed, showing the compactness of the contents.

Conclusion and Recommendation

The Bontrager Adventure Top Tube Bag proves to be a viable alternative to a saddle bag, offering easy access to essentials. Although it requires careful packing due to limited space, it functions well and secured the items effectively.

The speaker compares the aerodynamics of the Bontrager bag to the saddle bag.
The speaker compares the aerodynamics of the Bontrager bag to the saddle bag.

The streamlined design is more aerodynamic than the saddle bag. While minor stability issues exist with slight tilting, the overall benefits outweigh the drawbacks for many cyclists.

The speaker summarizes their review of the Bontrager bag
The speaker summarizes their review of the Bontrager bag