Apidura Aero Bolt-On Top Tube Pack Black

The Apidura Aero Bolt-On Top Tube Module is designed for gravel racers looking for a clean aerodynamic integration. Fixed directly to the top tube inserts, it is placed as close as possible to the stem to smooth airflow and limit drag. Combined with the Aero Frame Module, it allows for an advertised average saving of 5 watts at race speed, according to Apidura's wind tunnel tests.

Its ultralight construction in TPU laminated Hexagrid, PFAS and PFC-free, is reinforced by an internal HDPE structure and a full carbon fiber reinforcement to maintain a rigid shape, without straps. The magnetic closure allows quick one-handed access to the 0.4 L main compartment. The Transfer panels and elastic tensioner bring the bag closer to the stem and top tube for a seamless installation.

The module attaches with two M5 hex head screws on 64mm center distances and offers 5 cm of longitudinal adjustment for precise alignment with the back of the stem. Its radiofrequency welded seams ensure the waterproofing of the seams and materials, but the magnetic closure is not waterproof. Reflective graphics improve visibility.