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November 12, 2025 67 mins

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Summary
In this episode of the Training Babble podcast, host Dave Schell interviews John Karrasch, a bike fitter and coach who has ventured into tire rolling resistance testing. They discuss John's journey into bike fitting, the importance of real-world testing versus lab testing, and the complexities of rolling resistance and tire performance. John shares insights on tire selection, width, pressure, and compounds, as well as advice for conducting personal tire tests. The conversation highlights the significance of understanding tire characteristics to enhance cycling performance.



Takeaways

  • Real-world testing provides more applicable results than lab tests.
  • Rolling resistance is crucial for understanding tire performance.
  • Tire width and pressure significantly affect speed and handling.
  • Tire compounds play a vital role in performance and durability.
  • Different tire brands can have varying performance characteristics.
  • Selecting the right tire involves understanding local conditions.
  • Conducting personal tire tests can yield valuable insights.


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