The KMC S1 is a single-speed chain suitable for use with internally geared hubs, or any single speed drivetrain.

• The KMC S1 is a single-speed chain suitable for use with internally geared hubs, or any single speed drivetrain.
• High pin power with reinforced durability
• Offers a quieter riding experience
• Anti-drop design
• Inner plate chamfering helps to provide fast and smooth shifting