ONE FOR ALL. SRAM X1 delivers the all-terrain drivetrain engineered for the rider who knows no limits. Simple, smart, and synchronized, the X1 drivetrain is built to conquer whatever lies ahead. Designed with SRAM’s dedicated 1X philosophy and featuring our proprietary X-SYNC chainrings, the X1 product family puts you in control of every ride. SRAM X1. LIMITLESS.