How much capacity do I need?
For everyday commuting, 2 to 5 liters are usually enough – enough space for your keys, phone, and wallet. For day rides, 5 to 8 liters give you room for items like a rain jacket and basic tools. If you're planning a bikepacking trip, look for 8 to 15 liters of capacity so you can carry larger items such as a sleeping bag or tent.