The Topeak RX Trunk bag EX is small and compact but with enough room to store 2.8 litres, making it great for commuting. The EX trunk bag does not have panniers on the side like the Topeak RX EXP so is ideal if you do not need too much space, and want to easily carry the rack bag with you when you are off your bike. It is supplied with a carry handle and shoulder bag, and easily clips on and off your Topeak rear rack using Topeak's patented QuickTrack system Elastic bungees on the top of the rack bag are great for holding your cycling jacket while you ride, while the rear bike light clip is ideal for keeping you safe on the road. Topeak RX Trunk Bag EX Features Compact, large capacity main compartment with two side pockets Multi-function top pocket Foam walls provide padding and insulation for use as a cooler or camera bag Elastic top bungees 600/840 Denier material with Dupont Teflon coating 3m reflective strip, built-in carrying handle and shoulder strap Safety light clip Fits Topeak quick track pannier racks Dimensions: 28cm x 11cm x 14cm Capacity: 170ci Weight:630g More info