Don't Leave Home Without Two Of These!!!

It was during a road trip through Colorado's best mountain biking areas that I learned a valuable lesson: keep an extra rear derailleur hanger in your hydration pack! These little things keep your rear derailleur attached to your bike. Without it, no shifting or fun time! I can almost guarantee that the local bike shop that you go crawling to will not have your model, so that's why you should buy two and keep them on you all the time!