absoluteBLACK Single-Speed Cog – HG Spline 18t Black. absoluteBLACK single speed cogs feature a unique tooth shape narrow-wide profile and perfect roundness. Crafted with CNC machined 7075 aluminum with an anodized finish for long-lasting construction.

• Tooth design is wider and more “square like” compared to other single speed cogs
• The narrow-wide profile provides additional strength and offers greater chain retention
• Compatible with 1X 6 7 8 9 10 11 and 12-speed chains
• To utilize the narrow-wide feature use a 9 10 11 or 12-speed chain
• Not compatible with half-link chains

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