Excellent bike The Topeak RX TrunkBag EX is a nice single pannier that is easy to attach thanks to its RX Quicktrack system (note exclusive Beamrack luggage carrier!). The bag is aerodynamically designed which gives it a sporty look and offers less resistance if you want to make real pace. Handy to take with you The bag has a handle on top, making it easy to take it with you. In addition, there are reflective stripes on the bag, so you are more visible and it is safer for you on the bike. The contents of the bag is 3 liters, there is enough space for some small items. The bag is water-repellent, so you do not have to put off a small rain shower. QuickTrack system Slide, click and go! Topeak's own designed QuickTrack system makes the assembly of every pannier with this system a piece of cake. Thanks to this system, you do not need any tools and that makes placing the saddle bag on the luggage carrier incredibly easy. Place the Topeak bag on the luggage carrier and slide forward until it locks into place. No tools, no belts, no hassle. To remove the bag again simply press the yellow button and simply slide the bag back until the disconnection is complete.