Josh Poertner has spent most of his life in the cycling industry. First racing professionally in Europe, then working with Zipp as technical director before becoming the CEO of Silca. He also consults with professional cycling teams. Josh knows all the ins and outs of tire pressure optimisation, a topic we discuss in-depth in this interview. We also discuss a variety of other equipment upgrades that can make you faster on the bike, and importantly, the hierarchy of getting the most watts for your buck when it comes to such purchases.    IN THIS EPISODE YOU'LL LEARN ABOUT: -Optimising tire pressure (and the potential cost of getting it wrong) -Equipment choices and watts-for-buck: bike frame, wheels, and nutrition and hydration setup -Equipment choices and watts-for-buck: helmet, clothing, socks, shoes and shoe covers -Equipment choices and watts-for-buck: drivetrain friction, ceramic bearings, oversized pulleys, 1x drivetrain   SHOWNOTES: https://scientifictriathlon.com/tts235/   THAT TRIATHLON SHOW HOMEPAGE: www.thattriathlonshow.com   SPONSORS: Precision Hydration - One-size doesn't fit all when it comes to hydration. Take Precision Hydration's FREE sweat test and learn how you should hydrate. Use the discount code THATTRIATHLONSHOW15 to get 15% off your order OR use the code THATTRIATHLONSHOW and get your first box for free.   ROKA - The finest triathlon wetsuits, apparel, equipment, and eyewear on the planet. Trusted by Javier Gómez, Gwen Jorgensen, Flora Duffy, Mario Mola, Lucy Charles and others. Visit roka.com/tts for 20% off your order.   LINKS AND RESOURCES: SILCA website SILCA Tire Pressure Calculator Cycling episode archives on That Triathlon Show RATE AND REVIEW: If you enjoy the show, please help me out by subscribing, rating and reviewing: www.scientifictriathlon.com/rate/   CONTACT: Want to send feedback, questions or just chat? Email me at mikael@scientifictriathlon.com or connect on Instagram, Facebook, or Twitter.