Gravel bikes wind tunnel tested: How does the new Specialized Crux stack up against the Argon 18 Anti Matter, Wilier Rave, Lauf Seigla, and more?

Key Points:

• Cyclingnews conducted an extensive aerodynamic wind tunnel test of nine modern gravel race bikes, comparing their drag coefficients (CdA) at various yaw angles and speeds, including rider-on-bike and bike-only scenarios, to assess which models are most aero while factoring in tyre clearance and rolling resistance.
• The Argon 18 Anti Matter emerged as the fastest bike in bike-only tests, while the Specialized Crux 5 was the most aerodynamic with a rider onboard and also the lightest bike tested; wider tyre clearance (up to 57mm or 61mm) was shown to offer significant rolling resistance benefits that can offset aero penalties.
• The Trek Checkmate SLR underperformed aerodynamically despite promising tyre clearance, and the Basso Palta III, although premium and visually appealing, was heavier and less aero than competitors; the Lauf Seigla, with external cables and a round handlebar, ranked lowest aerodynamically but offers cost and maintenance advantages.
• Compared to a baseline road bike (Trek Emonda ALR), gravel bikes are generally 18 to 45 watts slower aerodynamically, but modern gravel bikes hold their own against older road models; rider position differences complicate direct comparisons.
• The study highlights the evolving gravel bike market where brands are increasingly designing aero frames with wider tyre clearance, and emphasizes that aerodynamics combined with appropriate tyre width can yield performance gains, though factors like ride quality, weight, and componentry remain important considerations.