Originally Posted by
veloz
Ortlieb Sport Rollers (25L/pair) are smaller than Back Rollers (40L/pair). Cheaper too - under $120. The “City” connotation only refers to the closure system (no shoulder strap) and the mount system (uses the previous generation mounts so needs an allen for initial set up adjustment). You can get 25L or 40L "City" versions.
Ah yea... so the Sport Rollers would be the better choice for front use then.