The Topeak Fuel Tank (Large) is a premium top-tube bike bag built for endurance riders and commuters needing quick access to essentials. With its spacious design, this bag easily stores nutrition bars, phones, wallets, tools, and accessories for long rides. The integrated battery cable port allows on-the-go charging of electronic devices, while the durable 420-denier nylon with PVC coating ensures water-resistant protection. The bag mounts securely using nylon straps that fit a wide range of top-tube and head-tube diameters, staying stable even on rough terrain. Easy-access zippers and the semi-rigid structure make it perfect for touring, gravel, or adventure cycling.