APIDURA - Aero Top Tube Module

A modular frame and top tube system that enhances aerodynamic performance, integrating with your bike to make you faster.

The Aero Top Tube Module is a performance-oriented solution for competitive gravel racers, developed through rigorous Computational Fluid Dynamics (CFD) analysis to smooth airflow behind the stem and improve aerodynamic efficiency.

Combining  with the Aero Frame Module creates  an average 5 watt saving at race speed, validated through wind tunnel testing and race-proven at the highest level, showing a benefit on every bike we’ve tested. View the data

For years we’ve helped riders go further, now we’re helping them to go faster. Learn how.

– Works with Frame Module to improve aerodynamics
– Transfer panel technology reduces drag
– One-handed fast entry to top tube module
– Soft interior base protects contents
– Ultralight Hexagrid construction

A modular frame and top tube system that enhances aerodynamic performance, integrating with your bike to make you faster.

Materials & Technology

HEXAGRID

An ultralight, high strength nylon grid, laminated with TPU to create a minimalist yet structured material. PFAs and PFC-free.

HDPE
High strength and rigidity reinforcement boarding with good shape recall to avoid deformation.

AERO OPTIMISED
Active improvement of the aerodynamic performance of the bike and rider.

ULTRALIGHT
Minimal design & lightweight materials for optimal weight-performance.

PRODUCT INFORMATION

Aero Benefit
– 5 watt average saving – view data.

Weight
– Top tube module – 45g

– Aero System (S/M) – 305g
– Aero System (L/XL) – 335g

Storage Configuration
– Single main compartment on top tube and frame modules
– Optional internal lash loop

Closure System
– Top tube module: fast entry magnetic closure
– Frame module: zip closure

Attachment System
– 3 Hypalon load straps, silicone backed to increase grip
– Velcro transfer panel attaches to downtube
– Rubber tension bands attach to head tube

Reinforced Structure
– Internal HDPE thermoplastic frame in both modules

Sizing
– Systems should be sized based on frame size, see our specifications, printable templates and sizing tool to find a perfect fit.

TESTING DATA

WIND TUNNEL TESTED
Read the full Aero System White Paper here.

CARE & MAINTENANCE

LUBRICATE ZIPPERS
Clean & lubricate zippers regularly with silicone or petroleum-based grease to maintain performance.

SPOT CLEAN ONLY
Stains can be spot treated with concentrated dishwashing liquid. Abrasion is not recommended

 

Climate Footprint

Raw Material Processing and Product Assembly are the most significant contributors to our products climate footprints.

 

ESTIMATED CARBON EMISSIONS FOR

AERO SYSTEM

S/M

 

ESTIMATED CARBON EMISSIONS FOR

AERO SYSTEM

L/XL

 

You can find out more about CO2e estimates and how they are calculated here.

You can find out more about CO2e estimates and how they are calculated here.

 

Specifications

The Aero System is designed to integrate with your bike to deliver an aerodynamic benefit. As such, the available sizes relate not to the capacity, but to the size of bike that is best suited to deliver this benefit.

We recommend using our Frame Pack Sizing Tool to check the fit before purchase.

As a rough guide, the L/XL side is best suited to bikes sized 56-58cm and above. The S/M is best matched to bikes from 52-56cm.

WEIGHT:335 g

SYSTEM CAPACITY: 3.2 L