A strapless, aero-optimised top tube pack that integrates seamlessly on your bike to make you faster. The Aero Bolt-On 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. For years we’ve helped riders go further, now we’re helping them to go faster. Specification Works with Frame Module to improve aerodynamics Transfer panel technology reduces drag One-handed fast entry to top tube module Ultralight Hexagrid construction 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 bo...