When you ride hard, your frame feels it. When your drivetrain is poorly calibrated or you just had a bad day, sometimes your frame feels that, too. Regardless, if you're on a Santa Cruz, or you just want to rep the company, slap on the Santa Cruz Molded Chainstay Protector to keep that drive-side stay looking sharp, and quiet, too. It protects your drivetrain and frame from one another.