General description This SRAM PC XX1 Eagle Hollowpin chain features 126 links and is designed for 12-speed drivetrains. Its innovative engineering allows for a gear range typically found only in 2-chainring systems, contributing to the ultra-smooth, precise, durable, and quiet performance of the Eagle drivetrain. The chain's design minimizes noise, friction, and wear on chainrings and cassette cogs. Technical specifications Number of links: 126 Speed: 12-speed Coating: Titanium Nitride (on Gold and Black models) Other information HARD CHROME technology enhances the chain's optimal performance life.