They're the meat and potatoes of the bike. If you have shifters and derailleurs that work and are crisp, you are sitting pretty, my friend. However, if your bike sounds like a manufacturer’s warehouse when you try to shift, with all that clanking and grinding, something ain’t right and you need some help. Not to worry, though, because here at Bikewagon.com we have front derailleurs, rear derailleurs, shifters and whatever else you need to make your bike purr again.