The blackburn outpost frame bag medium is the perfect bag for the larger frame bikes and perfect for a long weekend on the bike out for a day adventure or a cycling expedition the outpost frame bag has your back the frame bag is ideal for all of your smaller items puncture repair kits hand pumps sunglasses etc the bag also expands to allow for more space simply un zip the expander pocket to allow for more space overall this is a great bag which isnt as bulky as a pannier bag and dosent