Courtesy of BikeRadar: Chain checker products. A worn chain can negatively affect the performance of your bicycle's drivetrain, and lead to poor shifting, skipping gears, and even chain slippage. Regular checks of your chain allow you to address wear well before it can significantly impact your ride. This post may contain affiliate links. This means we may earn a small commission if you ultimately buy through links on our site. Learn more . So what is the best way to stay on