Marginal gains guru Josh Poertner is here to answer your questions. Josh is the owner of SILCA and previously worked as Technical Director at Zipp. We take a deep dive with Josh into everything from the importance of marginal gains for recreational cyclists to the impact of tyre hysteresis on rolling resistance. Tech nerds, this is one for you!! 00:00 Intro 00:28 Last Week’s Poll 04:37 Josh Poertner 06:02 Are marginal gains worth it? 08:22 What are the best marginal gains? 13:14 Do marginal gains matter at lower speeds? 15:26 Do wide tyres kill wheel aerodynamics? 20:30 What is tyre hysteresis? 23:20 Is testing accurate in the real world? 26:41 Hot Tech 30:04 Comments of the Week 36:19 Bike Vault Useful Links: GCN+ | Every. Unmissable. Moment. 👉 https://gcn.eu/8Qz Ride with us at the Global Bike Festival 👉 https://gcn.eu/GBF2023 Download the GCN App for free 👉 https://gcn.eu/app Visit the GCN Shop 👉 null Join the GCN Club 👉 https://gcnclub.com/ GCN Training Plans 👉 https://gcn.eu/gcntp What’s your favourite marginal gain? 🧐 Let us know in the comments below! 💬 Most Superniced Bike of the Week: Canyon Ultimate 👉 https://gcntech.co/Fg This Week’s Bike Vault: Colnago V3RS 👉 https://gcntech.co/Fh Giant Defy 👉 https://gcntech.co/Fi Elves Falath EVO 👉 https://gcntech.co/Fj DeRosa Neo Primato 👉 https://gcntech.co/Fk Enter your own bike and vote on other Bike Vault submissions on the GCN App! 📲 If you liked this video, be sure to give it a thumbs up 👍 and share it with your friends! Watch more on GCN Tech... 📹 Everything You Need To Know About Bike Tyres! 👉 https://www.youtube.com/watch?v=vMTH1IhqSb0 📹 Watch our Editor’s Choice Playlist 👉 https://gcntech.co/EditorsChoice 📹 Watch the latest GCN Tech Show 👉 https://gcntech.co/GCNTechShow 🎵 Music - licensed by Epidemic Sound 🎵 #gcntech #gcn #cycling #roadcycling #roadbike #bike #bikes #bikelife #biketech #aerodynamics #deepdive 📸 Photos - © Velo Collection (TDW) / Getty Images & © Sprint Cycling Agency Brought to you by the world’s biggest cycling channel, the Global Cycling Network (GCN), GCN Tech is the only channel you need for all things bike tech – past, present and future. Simply put, we’re obsessed with tech: we seek out and showcase the best in bikes, components, tech, accessories, upgrades and more from races and events, tech shows and product launches across the globe to bring you the best in road bike technology. We’ve also got great maintenance videos to help you get the most from your bike; pro-bike tours from all the biggest races; special features and the weekly GCN Tech Show. We also take a deeper look into the future of cycling, apps, smart tech and virtual riding. Join us on the channel and the GCN App to submit your content, vote on the latest tech and keep abreast of exciting new trends. Thanks to our sponsors: Castelli Clothing: https://gcn.eu/Castelli Pinarello Bikes: https://gcn.eu/Pinarello Zipp Wheels: https://gcn.eu/Zipp Topeak Tools: http://gcn.eu/Topeak Canyon Bikes: http://gcn.eu/-Canyon Pirelli Tyres: https://gcn.eu/Pirelli Orbea Bikes: http://gcn.eu/Orbea Vision Wheels: http://gcn.eu/Vision Wahoo Fitness: http://gcn.eu/Wahoo-Fitness Park Tool: http://gcn.eu/-parktool Elite Bottles: https://gcn.eu/EliteBottles Whoop Fitness: https://gcn.eu/Whoop Komoot: https://gcn.eu/komoot Selle Italia: https://gcn.eu/SelleItalia SIS: https://gcn.eu/ScienceInSport Zwift: https://gcn.eu/Zwift Shimano Wheels: https://gcn.eu/Shimano Shadow Stand: https://gcn.eu/ShadowStand DMT Shoes: https://gcn.eu/DMT Silca: https://gcn.eu/Silca Watch our sister channels: Global Cycling Network - null GCN Racing - null Global Triathlon Network - null GCN Italia - null GCN en Español - null GCN auf Deutsch - null GCN en Français - null GCN Japan - null GCN Training - null Global Mountain Bike Network - null GMBN Racing - null GMBN Tech - null Electric Mountain Bike Network - null