Our B3 bag and a bike: the absolute dream team. With an inner volume of 35 L and even up to 48 L when left open, this spacious bag can fit anything you need for an extended trip or competition. It is also the ideal daily helper: When shopping by bike, even heavy items can be easily stored. The B3 bag’s roller function and smooth-running casters make it easy to transport, even when full and not on a bike.