CROSSO Zipper Frame Bag

The frame bag: the heart of the bikepacking load system

The Crosso Zipper Frame Bag is a frame bag designed to make the most of one of the most efficient spaces on a bicycle: the inner frame triangle.

In bikepacking, this space is particularly valuable because it allows relatively heavy items to be carried while keeping the centre of gravity low, improving bike stability and control even on gravel roads or during long-distance trips.

Made from waterproof Cordura® TPU, with a splash-proof zip closure, the Zipper Frame Bag is a simple, robust and modular solution for adding carrying capacity without complicating the bike setup.

Within a classic bikepacking system it is often paired with a saddle bag such as the Crosso Mercator Saddle Bag and a top tube bag such as the Crosso Zipper Top Bag, creating a compact and well-balanced carrying system.

For a complete overview of how to distribute the load on a touring bike, you can also consult our guide to load systems for touring bikes.

Use in bikepacking

The frame bag is often considered the core element of a bikepacking setup.

Positioned inside the frame triangle, it allows heavier items to be carried without significantly affecting the bike’s balance. It is the ideal place to keep items that need protection but also quick access during a day of riding.

Typical frame bag contents

Compared with rear touring panniers, the frame bag helps centralize the weight, improving stability especially on steep climbs or gravel routes.

Perfect Fit: choose the right size with 1:1 templates

One of the most common questions when buying a frame bag is simple:
“Will it actually fit my bike?”

To solve this problem, Crosso developed a very practical system:
for each size of the Zipper Frame Bag, a 1:1 scale PDF template is available.

The process is simple:

In just a few minutes you can check:

This system allows you to choose the correct size confidently before purchasing, avoiding compatibility mistakes.

Complete size range: from S to XXL

The Zipper Frame Bag is available in five sizes, which is a major advantage since bicycle frames can vary significantly.

Available sizes

The S size can carry essential items such as a repair kit and windbreaker, while the larger versions can transport lightweight camping equipment or provisions for several days.

Modular mounting system (Daisy Chain)

The Zipper Frame Bag uses five Velcro mounting straps under the top tube of the frame.

The distinctive feature is the daisy chain loop system on the sides of the bag: this allows the Velcro straps to be moved along the entire length of the bag to choose the most suitable position.

This system offers great flexibility because it allows you to:

In practice, you decide where to position the Velcro straps, adapting the bag to your setup instead of adapting the bike to the bag.

Materials: durable and waterproof Cordura® TPU

The Zipper Frame Bag is made from waterproof Cordura® TPU, a material widely appreciated in bikepacking for its combination of strength and flexibility.

Main features

The closure uses a splash-proof zip, designed to reduce water ingress during moderate rain.

The bag is constructed with traditional stitching, not welded seams. This means it offers excellent protection against humidity and light rain, but it is not designed for immersion or prolonged heavy rainfall. For particularly water-sensitive items, additional protection is recommended.

In the bikepacking half frame bag segment, the Zipper Frame Bag sits in a highly competitive price range compared to solutions with similar features.

Safety and visibility

Reflective logos are placed on both sides of the bag.

This solution increases the reflective surface right at the centre of the bike, improving lateral visibility during night riding or at dusk — situations where many frame bags end up covering the bike’s original reflectors.

Integration in the bikepacking setup

Within the Crosso bikepacking system, the Zipper Frame Bag works together with other bags to distribute the load efficiently.

Typical configuration

This setup keeps the weight close to the centre of the bike, improving stability and control during travel.

Technical specifications

FAQ