Aerodynamics
Bike aero tests
Manufacturer claims are hard to compare. These are published tests where several bikes were measured under the same conditions. Numbers only compare within one test: speed, yaw angles, wheels and rider differ between tests. Tests age: bikes launched later aren't in them, so older results are flagged.
Independent tests
- TOUR · 2026 · Wind tunnelRecord-breaking test: Four aero road bikes compared by wattageGST wind tunnel, Immenstaad, Germany · 45 km/h · yaw -20° to +20° swept continuously, weighted for a 10 km/h mean wind4 bikes · fastest: Stromm RakttPublished this yearSee results →
- Cyclingnews · 2025 · Wind tunnelWind tunnel tested: 12 aero bikes (Cyclingnews Labs)Silverstone Sports Engineering Hub wind tunnel, UK · 40 km/h · yaw -15° to +15° in 5° steps (7 angles), weighted average using Nathan Barry's 2018 real-world yaw distribution13 bikes · fastest: Cervélo S5Published 1 year agoSee results →
- Cyclingnews · 2024 · Wind tunnelWind tunnel tested: 11 superbikes go head to headSilverstone Sports Engineering Hub wind tunnel, UK · 40 km/h · yaw -15° to +15° in 5° steps (7 angles), unweighted average12 bikes · fastest: Specialized S-Works Tarmac SL8Published 2 years agoSee results →
- RennRad · 2024 · Wind tunnelWindkanal-Test: 13 Modelle im WindkanalGST wind tunnel, Immenstaad, Germany · 45 km/h · yaw -20° to +20°, weighted average (0° weighted highest)13 bikes · fastest: Simplon Pride IIPublished 2 years agoSee results →
- Kiley Austin-Young, Brian Stover, Heath Dotson & David Bowden (via Slowtwitch) · 2017 · Wind tunnelTriathlon Bikes in the Age of Peak AeroA2 Wind Tunnel, Mooresville, North Carolina · 48.3 km/h · yaw -10° to +10° (0, ±5, ±7.5, ±10), weighted average: 30% at 0°, 20% at ±5°, 10% at ±7.5°, 5% at ±10°6 bikes · fastest: Cervélo P5-XPublished 9 years ago: dated, newer bikes aren't includedSee results →
- Inside Triathlon / Triathlete · 2013 · Wind tunnelFour of the world's fastest triathlon bikes testedFaster wind tunnel, Scottsdale, Arizona · 37 km/h · yaw -20° to +20° (0, ±5, ±10, ±15, ±20), weighted for the yaw a rider sees at 23 mph in an 8.1 mph wind4 bikes · fastest: Trek Speed Concept 9 SeriesPublished 13 years ago: dated, newer bikes aren't includedSee results →