The Ortlieb Sport Packer Plus Pannier Pair is a great solution to your transporting problems. The panniers are super versatile and can fit on front or rear racks, however they are designed to be mounted to the front of your bike. With the QL2.1 fixing system the bags can fit on most pannier racks, there are inserts for tube diameters 8, 10 und 12 mm with anti-scratch function preventing abrasion on the rack. The lower fixing of the pannier makes it versatile, with the capability of moving from side to side on an arc gives you many positions of contact for the mount to grab hold of. Inside the bag is an internal pocket and detachable shoulder strap which makes for easy transportation when in use off of your bike.