The derailleur is an important, albeit French, part of most modern bikes. This video features a professional mountain bike mechanic demonstrating the installation of a rear derailleur on a mountain bike. It is a short video, but detailed enough that any DIY bike mechanic should be able to do it themselves.
Want to master Microsoft Excel and take your work-from-home job prospects to the next level? Jump-start your career with our Premium A-to-Z Microsoft Excel Training Bundle from the new Gadget Hacks Shop and get lifetime access to more than 40 hours of Basic to Advanced instruction on functions, formula, tools, and more.