The Ortlieb Frame-Pack Toptube is a convenient frame bag for cyclists who take luggage into the frame, but also want to have room for a bottle cage. Also very suitable for cyclists with a Full Suspension mountain bikes or other bikes with a limited frame triangle. Please note the size: the bag is quite long (50 cm). Easy to mount Mounting is incredibly easy thanks to stable and highly adhesive Velcro straps on the top tube and the seat tube of the bicycle. When cycling, the bag is very stable on your racing or mountain bike. Lots of space! The four-litre Ortlieb Frame-Pack Top Tube offers enough space for heavy equipment such as tent poles, tools or provisions, which is stored with a low centre of gravity on the wheel. The bag isn't the only thing that is waterproof, the zipper as well. That's why you'll even be able to cross a river on the Bikepackaging tour.