Ask Josh Anything #19

Ask Josh Anything #19

Drivetrains, aero tweaks, and wheels have emerged as the sweet spot for where listeners can achieve marginal gains on their current bike setups, and this episode will really scratch that itch. We do a deep dive into the why, how, and what of Silca's new diamond-polished chains, how properly-lubed chains affect cog and chainring wear and tear, and whether you really need to replace that quick link after each chain connect/disconnect cycle. We also get to the best ways to locate your hydration on long rides and the question of whether — wheelwise — deeper is always better.

Got a question you’d like to ask? Text or leave a voicemail at the Marginal Gains Hotline: +1-317-343-4506 or just leave a comment in this post!

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11 comments


  • Ron S.

    I have a question that may be silly but here it goes. I have participated in a few slowtwitch aero and VE discussions and I was wondering if you can get rid of most of the variables could you actually accurately calculate the power(and I mean accuracy not precision). Here is what I was thinking, you build a bike with a faring that’s would resolve the issue of CdA variability, the other variables you can accurately measure such as weight, temperature, humidity, speed, or neutralize by making them constant for the test such as Crr. The course is set for zero net elevation gain a la Robert Chung. Then you need an accurate anemometer/ pitot tube to determine air speed and yaw. You make the test platform bike so that you can fit various power meters and compare the power from the meter to the calculation. Can this work? Could this be able to test various power meters for accuracy? It seems like I am missing something so that is the question, why would or wouldn’t this work.


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