There are many sizes, shapes, and styles of bags mountain bikers use to haul tools, clothing, food, and hydration. There are two main types of mountain bike bags: those designed to attach to the bike and those used for transporting gear to the trail. Saddle-mounted bags are best for carrying small items like multi-tools, extra tubes, and small parts like chain links and brake pads. Saddle bags typically attach to saddle rails at the top and are stabilized with a strap around the seat post. Bikepackers and those looking for more storage may also use bike top tube bags that attach above a mountain bike top tube. frame bags are designed to fit inside a mountain bike front triangle and can haul a ton of gear, depending on size. For true mountain bike touring, some riders find handlebar-mounted "roll" bags or even pannier bags mounted on special racks attached on the sides and back of the bike work best.