KMC S1 BMX Chain Description: The KMC S1 is a single-speed chain suitable for use with internally geared hubs, or any single speed drivetrain. Features: High pin power with reinforced durability Offers a quieter riding experience Anti-drop design Inner plate chamfering helps to provide fast and smooth shifting Internal gear hub system compatible Specifications: Speeds: Single Speed Links: 112 Chain Width: 1/2" (Outer), 1/8" (Inner) Chain Connector: Master Link (Reusable) Pin Type: Solid Color: Silver/Black Weight: -