Fixing a flat: Bike basics By James Sanna (TC Daily Planet) | November 24, 2008 Tweet Print Email Presta valve. Lock ring. Derailleur. The bike guru tells you what you need to know to get rolling again. Part 1 Part 2 See other bike basics videos:Bike Basics #1 Bikes on a bus: Bike basics Bike=car: Bike basics Wear and tear and traffic and grit: Bike basics Fixing a flat: Bike basics Related stories: No related posts.