Mismatched Tyres, Flappy Jackets & Bidon Microplastic | GCN Tech Clinic

Alex and Ollie are back at the GCN Tech Clinic to answer your most pressing bike tech and maintenance questions! This week, they're tackling the optimal tyre and rim interface for the best aerodynamics and discussing just how much loose, flapping clothing will slow you down. Plus, Ollie responds to your questions about his ultra-endurance ride, including his controversial tyre pressure choice and bike fit!

⏱️ Timestamps ⏱️
00:00 - Intro
00:23 - Should tyres & rims blend smoothly for aero gains?
03:15 - Does dried sealant unbalance your wheels?
05:21 - Is it safe to sit on your top tube?
06:52 - Your questions on Ollie's ultra-endurance ride!
10:08 - How to calculate pressure for different tyre widths
13:42 - How much does flapping clothing slow you down?
15:50 - Bike fit & aero wheels for ultra-endurance
21:52 - Are there microplastics in your water bottle?
23:04 - Outro

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It's a common sight at the cafe stop, but do you ever sit on your bike's top tube? Be honest! We won't tell your insurance providers 😉

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