WIND TUNNEL SECRETS FOR AERO GAINS ON YOUR BIKE | ROADMAN PODCAST

Josh from Silca joins us to dive deep into the aerodynamic secrets that pro cyclists use to gain free speed on the road. We're talking handlebar shapes, saddle design, body positioning, and the often-overlooked fact that the rider's body accounts for about 80% of drag — meaning small changes to how you sit on the bike can unlock massive watts of savings.

Key Takeaways

• Handlebar aerodynamics matter hugely: switching from a round bar to an aero cross-section can save 20-30 watts, and narrower bars (35-38cm) are faster than the wider bars that became standard in the 90s
• Turned-in hoods force a more efficient riding position by naturally keeping elbows in and hands narrower, which is why you're seeing younger pros adopt this technique on the road
• Body position trumps bike components: the rider makes up roughly 80% of drag, so positional gains and clothing/helmet choices deliver far more watts than tweaking rim shapes or spoke counts
• Saddle aerodynamics exist but comfort is the real limiter — even a 3-4 watt gain means nothing if you can't sit on it for five hours during a stage race
• UCI regulations are holding back innovation: changes like narrower Q-factors, longer/steeper frames, and nose-to-BB saddle rules could unlock more aerodynamic gains if the rules were relaxed
• Wax-based chain lube is the next frontier for everyday cyclists, and Silca's new chain stripper removes the biggest barrier to adoption by making the setup process fast and simple

Expert Quotes

"You should never ever ever be riding around a handlebar. It's the worst of all the possibilities — it's more pressure on your hands, less vertical deflection for comfort, and significantly less aero."

"We had this secret in the 70s and then we kind of lost it. It was really only in the 90s that bars started to get wide again — and now we're finding it again."

"The human on the bicycle is 80% of the drag. We can find tons of marginal gains around spokes and rim shapes, but that's all just playing within that 20%. The real gains are in the body, clothing, helmet, and position."