A rack pack is a medium-sized, cuboid piece of luggage designed to sit on top of a rear rack. It will generally hold up to 7 litres, enough for a packed lunch, a puncture repair kit and a mini pump.
Advantages of using a rack pack
- Rack packs remain stable while the bike is being ridden because the weight is carried in a narrow area directly above the rear wheel.
- A road bike with chainstays too short to take panniers will take a rack pack, if it will take a rear rack.
Some rack packs have a proprietary fixing rather than the usual straps. While this makes for quick release of the bag when you arrive, it also means you have to use the rack that goes with the system.