Tire pressure, aerodynamics, and smart equipment upgrades with Josh Poertner | EP#235

That Triathlon Show

Mikael Eriksson

Health, Swimming, Endurancesports, Run, Cycling, Health & Fitness, Fitness, Ironman, Swim, Bike, Sports, Running, Sportscience, Triathlon

4.9 • 596 Ratings

🗓️ 25 May 2020

⏱️ 91 minutes

🔗️ Recording | iTunes | RSS

🧾️ Download transcript

Summary

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.

Transcript

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0:00.0	as you're coming down the handle of the hockey stick, right, as the pressure is increasing,
0:04.7	you're probably picking up, I would say, depending on the tire construction, somewhere
0:10.9	between one and, I have to think, you're probably picking up one to three watts for every bar
0:19.5	of pressure increase. And then as soon as you hit
0:23.8	the brake point and it turns up, it's on average, again, depends on the faster tires have lower
0:31.0	slopes, both sides. slower tires have steeper slopes. But once you're into the impedance
0:37.3	range, I mean, we've seen tires that have a 8 to 10
0:41.1	watts per bar type of increase.
0:44.4	So, you know, it's much better to be one bar low of breakpoint than it is to be one bar high.
0:54.3	That Traflam Show, 235.
1:09.0	Hey, what's up, everybody, and welcome back to another episode of That Traathlon Show, the podcast
1:15.2	presented by Scientific Traathlon.com.
1:18.4	I'm our host Michael, and on today's episode, I interview Josh Porter, who is the CEO of Silka.
1:24.5	Josh has spent most of his life in the cycling industry with starting out racing professionally
1:30.0	in Europe, then working with SIPP as their technical director before becoming the CEO of
1:36.1	Silka where he now works. In addition to his main role at Silka, Josh also consults
1:41.8	with professional cycling teams.
1:45.1	We discuss in today's interview the ins and outs of tire pressure optimization.
1:50.2	We go really in depth on that, and that is an absolutely fascinating topic.
1:54.1	And you stand to gain a lot of watts, if you get it right, or lose a lot of watts,
1:58.8	perhaps is the correct way to put it if you get it
2:01.5	wrong. We also discuss a variety of other equipment upgrades that can make you faster on the bike
	...

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