AJA #47: Aluminum Velodromes, Forever Chemicals, Big-Wheel Aesthetics, and valve stem nerdery

from Marginal Gains Cycling Podcast, Presented by Silca

This Ask Josh Anything grab-bag starts with Tucson's new aluminum velodrome, evolves (devolves?) into altitude hacks for hour records, "no-rules" speed dreams, and holiday gift picks. From buying a kid's first bike (and why chain waxing might be the cleanest parenting win) to ESG-minded shop habits, Roubaix wheel diameter fever dreams to, aero brake-hose routing, and the Clik Valve debate—this episode covers the weird, practical, and wildly opinionated. Happy Holidays!

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This episode is 57 minutes long.

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This episode was published on December 22, 2025.

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