The Surly 1x1 Singleator offers a reliable, adjustable solution for tensioning chains on singlespeed drivetrains with vertical dropouts. Designed to mount directly to a standard derailleur hanger, the Singleator features a triple-sealed spring, floating 11-tooth pulley, and fully adjustable chain line. Its forged body and stainless-steel pivot bushing ensure long-term durability, while chain guides and a wide cog capacity support consistent, quiet operation. Compatible with both 1/8" and 3/32" chains.

• Triple-sealed spring, large cog capacity and chain guides
• Stainless steel pivot bushing
• Forged body
• Includes two springs for upward or downward tension adjustment. Push down spring installed, push up spring in packaging.
• Do not use with a coaster brake, fixed gear, multi-cog or multi ring drivetrains