Far-traveled and well-proven, the Sport-Roller Classic Panniers Pair is Ortlieb's classic model made from durable PVC polyester to withstand rough rides and carry your gear safely form point A to point B. The convenient QL2. 1 mounting system quickly and easily attaches to racks with tube diameters up to 16mm, and comes with included reduction inserts to accommodate tube diameters of 8mm, 10mm, and 12mm. A removable shoulder strap helps you carry the load when you need to leave the bike behind, and the 3M Scotchlite reflectors increase your overall visibility when you're on the road after dark.