Aero Bolt-On Top Tube Module Hike and its four-way stretch combines

and its four-way stretch combines with articulated patterning for exceptional freedom of movement

The FIDLOCK fastener allows quick access at any time and holds reliably even on gravel roads

you're in for a treat

18 L and 26 L offer a single unisex size

and there are also 4 manual speed settings should you want to set your own ideal airflow

Aero Bolt-On Top Tube Module Hike and its four-way stretch combinesA completely strapless, aero optimized top tube pack that integrates seamlessly on your bike to increase carry capacity for long, fast days in the saddle. Apidura's Aero Bolt On Top Tube Module is a performance oriented solution for competitive gravel racers who need to carry a bit more on their bikes, while maintaining a clean, secure fit.