Bike frame bag is a great addition to other bike bag combinations.

Bike frame bag is a great addition to other bike bag combinations. For example, you can combine a bike frame bag with a bicycle saddle bag if you only need a little bit of additional space. However, if you are carrying a large amount of gear and have filled up your bike panniers, bike handlebar bags, and bike rack-top bags, a bike frame bag will provide much needed space for those extra items you can't live without.
Bike frame bags are also a great option for bikepacking (ie. off-road bike touring), and they can be paired with a bike backpack for additional gear carrying space for off-road riding.