The Aero System is a two-piece set of Apidura bags – a top tube module and a frame module – designed to work as one to reduce drag. Built for gravel racing (and just as usable on the road), the system integrates with the bike via transfer panels and soft elements that close the gaps around the top tube and head tube.

Claimed figures

Developed using CFD analysis and validated in a wind tunnel, the Aero System claims an average gain of 5 W at race speed, with a benefit observed on all bikes tested by the brand. The full methodology and results are available in the Apidura white paper.

Design and materials

• Complementary modules: top tube + frame, designed to work together.
• Transfer panels (down tube and around the stem) to optimise aerodynamic integration.
• Upper “skirt” to minimise gaps around the top tube.
• HDPE internal structure in both modules to hold shape.
• Hexagrid material: ultralight reinforced nylon, TPU-laminated.
• Soft inner base to protect contents.
• Cable pass-through for charging devices while riding.
• Slim profile to reduce the risk of knee/bag contact when sprinting.

Closures and access

• Top tube module: magnetic opening, one-handed operation.
• Frame module: zip closure for heavier or bulkier items.

Attachment and stability

• 3 Hypalon load straps with silicone backing and cam buckle.
• Velcro transfer panel on the down tube.
• Low-profile tension straps around the head tube.
• Non-slip silicone lining to limit movement.

Weight, volume and sizes

• S/M: 305 g – system capacity 2.2 L
• L/XL: 335 g – system capacity 3.2 L

Note: the sizes target frame compatibility and aero performance, not a difference in use between modules.

Choosing the right size

Apidura recommends choosing according to frame size rather than capacity:

• S/M: bikes ~52-56 cm
• L/XL: bikes ~56-58 cm and beyond

Printable templates and an interactive tool let you check fit before purchase.

Intended use

The system targets gravel racers and ultra-distance riders seeking minimalist storage with a measurable aerodynamic benefit. Capacity is deliberately kept low to preserve airflow integration.

Price and availability

The Aero System is listed at €218.00 (frame module + top tube module, sizes S/M or L/XL). Size choice depends on the bike, not the volume sought.

Key takeaways

• Claimed aero gain: ~5 W on average at race speed (CFD + wind tunnel).
• Integration via transfer panels (down tube, stem, top of the top tube).
• Quick access at the top tube (magnetic), secure storage in the frame module (zip).
• Low weight: 305 g (S/M) to 335 g (L/XL) for 2.2-3.2 L.

Our take

A luggage system designed from the outset for aero is still rare in gravel, especially as a universal, non-frame-specific solution. The claimed 5 W look plausible and meaningful for those who ride fast for long periods (gravel races, ultra), provided the fit is carefully dialled – installation and size choice therefore become decisive if you want to replicate the measured gains. Compared with traditional bags (more voluminous but less streamlined), the Aero System prioritises aerodynamic efficiency and stability over capacity. Across the market, it aligns with the competitive gravel go-faster trend while remaining compatible with a wide variety of frames. For heavily loaded bikepacking, larger volumes will remain more suitable; for racing, this integrated approach offers a performance lever you can actually measure.