Fast Talk 368: Are Shorter Cranks Faster?
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Apr 24, 2025 Lennard Zinn, an acclaimed author and expert on bicycle maintenance, dives into the intriguing debate around crank length in cycling. He discusses how shorter cranks can enhance aerodynamics and cadence, particularly benefiting elite athletes like Tade Pogaccia. Zinn explores the relationship between crank length and cycling efficiency, revealing personalized fitting's crucial role in performance. Expect insights on the physics of cycling, including power and torque, and the evolving trends that shape rider experiences in competitive environments.
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Testing 17 Crank Lengths
- Leonard Zinn built a custom ergometer to test 17 crank lengths from 100mm to 220mm.
- Surprisingly, all riders, regardless of height, performed best on the longest cranks.
Test Crank Length Personally
- Try different crank lengths to find what fits your physiology and riding style.
- Don't just follow trends; personal testing is key to optimal fit and performance.
Power = Torque × Cadence
- Power output depends on torque times cadence, where torque equals force times crank length.
- A rider can produce identical power with higher cadence and shorter crank or higher force and longer crank.