Once you have learned the basics of installing a 1X drivetrain, there are a host of details to fine-tuning and maintaining it. Eventually, it will start making annoying clicking sounds, or skipping out of the gear you select. From the first day a new drivetrain is installed until it is recycled, pieces stretch, loosen, wear, and become bent. The troubleshooting guide below will take you through some common shifting issues, followed by their most likely causes and solutions. We will stick to problems that plague rear derailleurs, as 1X setups are common on most modern mountain bikes. For older bikes with front derailleur issues, the solution is quite simple: Remove the front derailleur and replace the chainrings with a single 1X-specific ring and wide range cassette. Boom! You just cut your drivetrain problems in half. In all seriousness, we need to define a few key terms before starting. If you already know bicycle drivetrain nomenclature you can skip ahead to the troubleshooting section. The low limit screw adjusts the limit of how far a derailleur can move toward the lowest gear. The lowest gear is the big spinny one used to climb steep stuff, and it is located nearest the spo...