Apidura Expedition Full Frame Pack (4.6L) The Expedition Full Frame Pack (4.6L) is the definitive cornerstone for serious bikepacking and ultra-distance cycling setups, offering durable, waterproof storage that maximises every inch of the space inside your frame. By securely filling the main triangle of your bicycle, this 4.6-litre pack creates a large, central storage space designed specifically for housing your heaviest gear. Positioning items like camp stoves, tools, or heavy spares directly inside the frame keeps your centre of gravity low and perfectly balanced. This thoughtful weight distribution ensures your bicycle retains its natural, agile handling and stability, whether you are climbing steep mountain passes or navigating technical gravel descents. Advanced Structural Stability and Weatherproofing Engineered to handle the rigours of self-supported expeditions, this pack features innovative Internal Zipper Control Rails. This internal framework is meticulously designed to prevent the pack from bulging outwards when fully loaded, eliminating any annoying knee rub while pedalling and ensuring smooth, reliable zip performance in all weather conditions. The premium seam welded waterproofing guarantees that your gear remains bone dry in the most torrential downpours. The pack also offers an internal shelf that allows you to easily create separate top and bottom compartments, helping you stay organised on the trail. For a flawless aesthetic, the Frame-fit Panels conform neatly to the shape of your tubes for a clean, custom-made appearance, while heavy-duty Hypalon Stability Straps and a targeted silicone print along the edges ensure a stable fit that locks the pack firmly in place to eliminate frame abrasion and sway. Integrated Backcountry Hydration and Power This full-frame powerhouse is fully compatible with the specialized Frame Pack Hydration Bladder, transforming your frame triangle into a seamless, high-capacity water reservoir. This integration allows you to carry significant amounts of water on the go without the need for traditional bottles, freeing up external cage space for other essentials. Additionally, a dedicated cable port allows for on-the-go device charging, letting you seamlessly run a power bank cord from the waterproof interior out to your cockpit electronics. For third-party sellers, this highly technical, durable construction pack is an essential offering for adventure cyclists looking to maximise their carrying capacity with a premium, rattle-free, and aerodynamic storage solution. on.