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Marginal Gains Cycling Podcast, Presented by Silca: Daily Summaries Delivered
by SILCA
The Marginal Gains Podcast, presented by Silca is the show that makes a big deal about the little things, and how those little things...can be a big deal. Josh Poertner of Silca, along with Hottie and Fatty, talk about all aspects of cycling — design, manufacturing, marketing, riding, racing, management and more, all from a thoughtful perspective. It's a podcast for the thinking cyclist.
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- 5 days ago43 min
Gary Fisher
We believe in staying in touch with the history of bicycles. Knowing where we've been can often tell us where we are going. That idea has been frequently used when discussing the emergence of the 32 inch wheel. "It's like when we went from 26er to 29er" they say. But what was it really like to be in the trenches through the birth of the Mountain Bike? The struggle to find parts. The original wheel size dilema. The passion to push the industry in a new direction. Gary Fisher know what it was like. Gary -- as you probably know -- is a Mountain Bike OG: Pioneer. Thinker. Doer. He helped bring a new style of riding and the new bikes to ride on into the world of cycling. He is a part of bicycle history. Josh and Hottie talk to Gary about what it took to see a vision become reality. From hanging out with the Greatful Dead to bombing down Marin County's Repack Trail. Gary has a million stories that somehow are stored in one amazing cycling mind.
- 2 weeks ago54 min
AJA #52: Protocol Tire Tech-Cargo Bibs-Long Sleeves for Aero
Hottie and Fatty pepper Josh with tire questions. Specifically what is and is not a radial casing and how his team was able to move towards a radial ply angle without disrupting tire stability. Josh also explains how they arrived at Protocol's knob shapes and patterns. From our listeners we have quesions on putting gels in cargo bibs. Does this result in unecessary heavy lifting? Josh answers one on the optimal place to mount a mini pump. On the downtube or the seatube? We also get into why in the spirit of manipulating air flow we don't see more pros wearing long sleeve jerseys?
- Aug 18, 202654 min
Leadville Trail 100 Bike Tech
The Leadville 100 Mountain Bike Race has long been grounds for equipment tinkering and experimentation with the hopes of shaving minutes .. even seconds off finish times. Drop bars on mountain bikes at Leadville may seem recent but actually it was first tried by a pro in 2009. Travis Brown showed us by putting road bars on his Trek Full Suspension 26 inch mountain bike that anything can and should be considered when setting up a Leadville race bike. Drop bars, aero bars, and bar ends mounted inboard are now banned. But the experimentation and tinkering continues. We went to ten-thousand feet to find out how some of the fastest riders were planning to cheat the wind and reduce rolling resistance over the 100 miles plus of Rocky Mountain pain and suffering. Due to a nearby wildfire, the course was changed. Less climbing and more road was on the plate. Riders were making adjustments in both tactics and tech. In this episode we take a look at the common threads as riders headed for the start line. Paige Onweller gives us an inside look at dialing a bike for this unique race. We also get some feedback on how 32 inch wheels perform when placings and prize money are at stake. Two pros – Zach Calton and Emma Langley – share their thoughts on riding big wheels on big climbs. And we get a full recap from the front of the men's race from a guy who has been there a lot. John Gaston details the attacks and alliances that defined the 2026 Leadville 100. Plus we hear about the tech he used and rejected for this year's edition of the LT100 MTB Race.
- Aug 11, 202657 min
Darren Baum - How Bikes Behave
If Bike sales were purely based on a beauty contest, Baum Cycles would be at the top of the charts. Baums are stunning, Titanium machines. Most of them are custom built by an out-of-the-box thinker in Geelong, Victoria, Australia: Darren Baum. But what motivates us to choose one bike over another is more than just looks. A bicycle -- especially a performance bike -- has to deliver where and when it matters. Darren is dialed into that as well. Darren has obsessed over geometry, center of gravity, and chainstay lengths for more than two decades. His mission is to not only make bikes look good on paper and in photos, but to make them accelerate, turn and climb like no other. In this interview we get a refreshing look at what it takes to build a custom, performance bicycle. Some things are just a tweak but other approaches by Darren are revolutionary.
- Jul 28, 20261h 0m
Paige Onweller - Details Matter
While listening to Paige Onweller answer our questions, we found ourselves wishing we could be more like her. Wishing we her organizational skills, of her critical thinking, her ability to adapt quickly. Paige has the foundational pieces to be a Marginal Gainer that makes us think, "I wish I was more like Paige." Paige's focus on details started well before she ever saw a Gravel Race start line. She was a collegiate runner and after that, had a career in medicine. But like we've heard from many runners, her sport led to injury which led her to the bike. At first, her riding was for fitness while she healed. But then she discovered how good she was, and so did others. Namely team Twenty-Twenty Four. They brought her on board to do Zwift racing and Time Trials. Before she knew it she was on a start line in Nebraska at Gravel Worlds. Then her career in medicine was put on hold as Paige took her detailed approach to the Life Time Grand Prix. Josh and Paige's partnership started this spring in the wind tunnel. The two of them got together for a focused approach on aerodynamics and women. They made some very interesting discoveries which we talk about in this show. Ever thought about waxing hair? You will after hearing them discuss Paige's aero bun.
- Jul 6, 202654 min
AJA #51 Road Spray Aerodynamics and Argon Gas in Tires
Josh sinks his teeth into questions on turning road spray on a frame into aerodynamic information, Argon gas in tires and deep, carbon wheels for XC mountain bike racing. We also talk about Fatty's successful Everest challenge – the Marginal Gains that worked and the ones that didn't. And we get into some new happenings with Silca.
- Jun 8, 202651 min
Rolling Resistance Testing with John Karrasch
A favorite topic on the Marginal Gains Podcast is rolling resistance, also known as CRR. It is one of the cornerstones of this show. While we have interviewed aerodynamic experts who have devoted hundreds of hours to CdA, we have found very few who have made CRR their passion. Tom Anhalt was an early guest but we can't think of another since. That changes with this episode. John Karrasch makes a living from bike fittings. But John has made a name for himself through his tire testing. Using the Chung method, John has been putting tires to the test to see which ones live up to the hype. In just more than a year, he has amassed an impressive database covering just about every brand you can name. The beauty of John's work and results is he shares it with all of us at no cost. In this interview, John shares his early beginnings with the Chung method, how he has refined his testing, and what some of the key learnings have been. The only thing between your bike and the surface you ride are your tires. John is one of a few who has been trying to quantify just how much power it takes to keep those tires rolling.
- May 26, 202632 min
Inflatable Inserts and Radial Tires
It's funny how tubeless freed is from tubes and years later some of us turned to putting something else in the space between rim and tire. Namely inserts. Most of them are foam and a real struggle to install. Then there's OPTIS: The Odyssey Tire Pneumatic Insert System. Cool acronym that basically means "inflatable insert." The people at Odyssey will be quick to say OPTIS is not a tube. While it does press up against the sidewall when inflated, it's job is just like a foam insert: to prevent pinch flights. OPTIS weights significantly less than a foam insert and it's behavior is adjustable. We spoke with Jacob Hinton from Odyssey on this unique product that recently gained notoriety during a spring classic. Up next is a look at radial tires for bikes. 32 inch wheels have garnered most of the buzz in 2026 but radial tires are also making waves. Two big tire makers have jumped into the space and made claims of enhanced grip for gravity style riding. A third company, Delium, has also been developing radial tires. We hear from this lesser known maker about how tech works and its potential in the bike space.
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About Marginal Gains Cycling Podcast, Presented by Silca
The Marginal Gains Podcast, presented by Silca is the show that makes a big deal about the little things, and how those little things...can be a big deal. Josh Poertner of Silca, along with Hottie and Fatty, talk about all aspects of cycling — design, manufacturing, marketing, riding, racing, management and more, all from a thoughtful perspective. It's a podcast for the thinking cyclist.
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