#AskGCNTech Got bike tech questions? We’ve got the answers! In this episode, we're tackling your biggest cycling questions! We'll be diving into: best upgrade after tyres & wheels, square taper bottom brackets, monster 11-42T cassette,28mm vs 30mm tyres for big endurance events, best GPS units & screen hacks for ageing eyes & LOTS more! Plus, loads more tech tips to keep your bike rolling faster and safer! ⏱️ Timestamps: ⏱️ 00:00 Welcome to #AskGCNTech 🙌 00:18 What's the next best upgrade after tyres, wheels, and bike fit — is it getting a coach? 02:11 I bought an old dream frame with a square taper bottom bracket — should I keep it or upgrade to a modern system for better efficiency? 03:25 Can I use thicker third-party brake rotors with my Shimano brakes, or is that a bad idea? 04:40 Can I fit an 11-42T cassette on my SRAM Rival eTap without changing anything else? 05:47 For the Fred Whitton challenge, should I run 28mm or 30mm tyres for comfort without sacrificing speed? 06:26 Best cycling GPS head units (or hacks) for ageing eyes? 08:04 Running different tyre widths front & rear — how should I adjust tyre pressures correctly? 09:16 What cleaning solution did Ollie use in his ultrasonic cleaner to get his old groupset looking brand new? 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 Use #askgcntech when asking your questions! Watch more on GCN Tech... 📹 Restoring & Building A Retro Italian Steel Bike 👉 https://youtu.be/Z3s2ecKCry4 📹 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 🎵 #upgrade #brakes #rotor #tyres #bb #shimano #brakes #cassette #speed #headunit #gps #ultrasoniccleaning #groupset #gcntech #gcn #cycling #roadcycling #roadbike #bike #bikes #bikelife #biketech 📸 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: Pinarello Bikes: https://gcn.eu/Pinarello Topeak Tools: http://gcn.eu/Topeak CamelBak: https://gcn.eu/Camelbak 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 Volkswagen Commercial Vehicles: https://gcn.eu/VW 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 Watch our sister channels: Global Cycling Network - https://www.youtube.com/@gcn GCN Racing - https://www.youtube.com/@gcnracing Global Triathlon Network - https://www.youtube.com/@gtn GCN Italia - https://www.youtube.com/@gcnitalia GCN en Español - https://www.youtube.com/@gcnenespanol GCN auf Deutsch - https://www.youtube.com/@gcnaufdeutsch GCN en Français - https://www.youtube.com/@gcnenfrancais GCN Training - https://www.youtube.com/@GCNTraining Global Mountain Bike Network - https://youtube.com/@gmbn GMBN Racing - https://youtube.com/@gmbnracing GMBN Tech - https://www.youtube.com/@gmbntech Electric Mountain Bike Network - https://www.youtube.com/@embn