Ask Josh Anything #12

We are happy to report that we continue to seek questions Josh is unable to answer, or at least unwilling to try. We regret to announce that we have so far failed, in spite of the fact that in this episode we expanded our universe of acceptable questions to include how to make electric scooters more aero. Josh was, in fact, distressingly excited by this question.

We (or more to the point, you) also asked questions about:

  • Silca’s new Super Secret Lube: To be honest, we spent a few minutes asking about this lube, and then about half an hour talking about lubes in general, the importance of lubing, and the proper way to lube. 
  • Pressure calculator vs manufacturer specs: What should you do when the Silca tire pressure calculator gives you one pressure recommendation, but the tire manufacturer gives you a much higher minimum recommendation?
  • Pressure calculator and tube type: Does the way you keep the air in your tire (latex tube, butyl tube, tubeless, tubular, etc.) matter in the pro tire pressure calculator? If so, how much? And if not, why not?
  • Tire hysteresis and contact points — we have some followup questions for Josh about his recent conversation with Path Less Pedaled. 

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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3 thoughts on “Ask Josh Anything #12

  1. You spoke of the fear of hydrogen embrittlement in the metal of the chain if one left a chain in degreaser, which would seem from what little I know needs to be acidic. Then you suggest that ultrasonics would be better. Has anyone looked at hydrogen embrittlement after sonic action? Many chemical reactions are accelerated by ultrasonics, the field of sonochemistry is dedicated to this. Another concern is that sonication can cause pitting of metallic surfaces due to the energy release of the collapse of cavitation bubbles. So since so many people have used ultrasonic baths to clean chains it suggested that it is not a problem for the times in the bath? So back to the initial question is the embrittlement caused by corrosion reactions? I would love to learn more about this.

  2. in episode 10 you mention that there is virtually no difference between a latex tube in a tubeless and a straight tubeless set up. What would happen if you added sealant to a latex tube in a tubeless tire? Would you get similar rolling resistance and added small puncture protection?

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