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Join us in the GCN Tech Clinic as we sit down with Paul, Head of Product Education at CeramicSpeed, for a deep dive into drivetrain efficiency, bearings, and marginal gains. We cover everything from the efficiency of oversized pulley wheels (OSPW) and 1x vs 2x systems to chain maintenance, lubricant choice, and how power output affects friction. If you're looking for free speed and answers to your biggest tech questions about your bike's drivetrain, you won't want to miss this! Chapters: ⏱️ 0:00 - Intro: GCN Tech Clinic with CeramicSpeed 0:36 - Oversized Pulley Wheels: Why Not Standard? 2:53 - 1x vs 2x Drivetrain Efficiency 6:03 - The Truth About Dirty Chains and Friction 7:58 - How to Measure Chain Wear & Speed 12:53 - Drivetrain Power Loss Scaling (Linear vs Constant) 15:34 - Spring Tension, Chain Length, and Friction 17:36 - Optimizing Chainring and Cassette Size 22:56 - Cadence vs. Mechanical Efficiency 25:03 - Shimano vs. SRAM Chains & Break-In Time 29:46 - What Grease To Use? Useful Links: GCN Tech Uploader 👉 https://gcn.eu/techuploader Subscribe so you don’t miss a thing 👉 https://gcntech.co/subscribe Insurance: Viewers in the USA and UK can explore GCN Insurance products 👉 https://gcn.eu/GCNinsurance Sign Up To The GCN Newsletter 👉 https://gcn.eu/Newsletter Visit the GCN Shop 👉 https://gcn.eu/gcnshop GCN WhatsApp Channel 👉 https://gcn.eu/GCNwhatsapp GCN Instagram Broadcast Channel 👉 https://gcn.eu/instagrambroadcast Join the GCN Club on Zwift and ride with us! 👉 https://gcn.eu/GCNClubRides The CeramicSpeed team says a 2x drivetrain is more mechanically efficient than a 1x system due to better chainline and larger chainrings! Are you team 1x or 2x, and why? Let us know in the comments! 👇 Watch more on GCN Tech... 📹 • Entry Level bike + £1500 Upgrades - Was It... 📹 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 #bearingsexpert 📸 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 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! Thanks to our sponsors: Canyon Bikes: http://gcn.eu/-Canyon Orbea Bikes: http://gcn.eu/Orbea Pinarello Bikes: https://gcn.eu/Pinarello Topeak Tools: http://gcn.eu/Topeak CamelBak: https://gcn.eu/Camelbak Pirelli Tyres: https://gcn.eu/Pirelli Vision Wheels: http://gcn.eu/Vision Wahoo Fitness: http://gcn.eu/Wahoo-Fitness Park Tool: http://gcn.eu/-parktool Selle Italia: https://gcn.eu/SelleItalia Zwift: https://gcn.eu/Zwift Silca: https://gcn.eu/Silca MET Helmets: https://gcn.eu/methelmets Core Body Temperature: https://gcn.eu/corebodytemp Precision Fuel & Hydration: https://gcn.eu/precisionhydration Elitewheels: https://gcn.eu/Elitewheels CeramicSpeed: https://gcn.eu/GCNCeramicSpeed Watch our sister channels: Global Cycling Network - / @gcn GCN Racing - / @gcnracing Global Triathlon Network - / @gtn GCN Italia - / @gcnitalia GCN en Español - / @gcnenespanol GCN auf Deutsch - / @gcnaufdeutsch GCN en Français - / @gcnenfrancais GCN Training - / @gcntraining Global Mountain Bike Network - / @gmbn GMBN Racing - / @gmbnracing GMBN Tech - / @gmbntech Electric Mountain Bike Network - / @embn