Precision-machined and built to perform, the SOLO-HG Cogs are made to pair with any single speed setup using a Shimano HG-style freehub body. Each cog is designed with a unique tooth profile for exceptional chain retention. Whether you're racing, commuting, or just keeping it simple, these cogs deliver bomber reliability with a clean chainline and a wide footprint to protect your freehub.CNC-machined from premium lightweight 7075 aluminumNarrow to Wide tooth profile for secure chain engagementWide cog base distributes load and helps prevent notching on alloy HG freehub bodiesCompatible with 9, 10, 11-speed chains and most 12-speed chains (SRAM Eagle, SRAM Road, KMC, Transmission T-Type)NOT compatible with Shimano 12-speed HG+ or Campagnolo 13-speed chainsItem SpecificationsDefined ColorBlueMaterialAluminumTooth Count18 Wheels Manufacturing Solo-HG Narrow-Wide Single Speed Cog Driver and Single Cog UPC: 810124713690