Marginal Gains Cycling Podcast, Presented by Silca

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.

Our 50th Ask Josh Anything! That's a lot of questions and answers and "It Depends." Thanks for hanging with us to the mid century mark. On the Q&A agenda this episode: The perfect padding for aero armrests. Tire inserst for Unbound Breaking in tires for best CRR The right gears for an Everesting Narrow flat bars for Leadville Gravel wheels on a road bike and the rule of 105

We rarely chase trends or product announcements on the Marginal Gains Podcast. The news of the day we mostly leave to other shows. So allow us while we make an exception to our normal behavior and take a stab at the 32 inch wheel. The wheel size is not the new thing here. It's the tire that's creating some buzz. A viable, tubeless mountain bike tire to be precise. When Maxxis started showing its 32 inch Aspen, bike builders took notice. Some fired up their CAD programs to see if they could make it work. Using heat and steel, drawings were then turned into something rideable. One of those designers is Daniel Yang. Yang MFG and Neuhaus Metalworks have produced the Nova; a mountain bike buit around the 32 inch wheel. Steel, fully rigid, geared or single speed. We met up with Daniel on the trail and took the Nova for a test ride. After, we sat down at a park picnic table for a discussion on what it took to fit these wheels into a frame, who this bike is for and who it is not for and what could be mountain biking's next big move.

Marginal Gainers are familiar with Best Bike Split -- the website where using rider data you can forecast a finish time on a specific course. It has been a great tool for years for amateurs and pros alike. Josh has frequently referenced BBS on the show. Fatty and Hottie have discussed it on their Leadville Podcast. But we wanted to know what is under the hood. For that we turn to its founder Ryan Cooper. Before Best Bike Split, Ryan was a lot like us: a competitor with the hopes of going faster. Unlike most of us, he's really good at math. His ability to come up with equations and sus out variables gave him the tools to invent Best Bike Split. But the inspiration was more of an experiment -- a story will leave for him. In the interview, Ryan shares what he can about how BBS comes up with its forecasted times. He also talks about some new features he has in the works like factoring in tarmac conditions to better hone in on times. Ryan also wants listeners to get a taste of BBS and he is extending a discount to listeners of the pod. Use the code MARGAINS25 for a discount and as Ryan says: Race smarter. Ride faster. Win more.

Australian cycling champ and Grand Prix contender Brendan Johnston shares the races that shaped him, the setbacks that tested him, and an upcoming project that may become his ultimate proving ground.

We take a look at what has become a dilemma for some Marginal Gains seekers and that is optimizing aero, rolling resistance on a tubeless, hookless rim. Josh has an admittedly unpopular take on the subject. We also get into the aerodymanic idea known as the Magnus Effect. The principle says that a spinning object will develop unequal pressure on either side as it moves throught air. Josh expains how -- if at all -- the Magnus Effect, affects that rotating thing we love; the bicycle wheel. We also have questions on hot waxing in a vacum oven, the aero cost of external cables, and what is kind of a Silca product shocker: it's Ultimate Shock Pump.

Behind every great cyclist is a great bike fit, which means a great bike fitter. Honestly, we're not sure it's possible to overstate the gains — or losses— a bike fit can bring. And a startling number of top pros we've had on this show trust Barry Anderson of Cyclologic, in Scottsdale Arizona. Barry has popped up on our radar numerous times and for numerous reasons recently. We're excited to share Barry's practical guidance on the why, how, and who of a great bike fit.

Fatty is obsessed with mini compressors and so jumps the line in this episode of Ask Josh Anything with several questions he has about Silca's new Elettrico series, Silca's innovative, just-released electric mini pump that is available everywhere (except the US) now. We also got some great feedback/pushback on part of Josh's recent FAQ episode, and a novel new product idea involving tap water from Indianapolis. And, as always, so much more.