This triangular bike bag offers versatile mounting, a compact footprint, a built in water bottle holder, and practical storage for tools and keys. It is designed to fit a variety of bikes while keeping essential items within easy reach. - Versatile mounting options: The triangular shape allows easy mounting on both mountain bikes and road bikes, providing flexibility for different bike types and frame geometries. - Compact size: Dimensions are 17 cm x 19 cm x 22 cm (6.69 in x 7.48 in x 8.66 in). The bag is compact yet spacious enough to hold your essential items without adding excessive bulk to your ride. - With water bottle holder: Includes an integrated water bottle pouch, so your bottle can be stored conveniently on the frame. - Convenient storage: The triangular design provides space to carry tools and keys, making it a practical and essential accessory for cycling. Ideal use scenarios - Long rides or commutes: Keep essential tools and spare keys within easy reach without increasing ride clutter. - Rides requiring hydration access: Store your bottle in the built in holder for quick access on the go. - Compact touring or daily use: A streamlined solution to organize small gear while maintaining a clean, low profile on the bike.