Surly Singleator mounts right up to your derailleur hanger and provides a simple, effective, and adjustable means of tensioning the excess chain slack found in vertical dropout single-speed drivetrains.
- Triple-sealed spring, large cog capacity and chain guides
- Stainless steel pivot bushing
- Includes two springs for upward or downward tension adjustment
- Do not use with a coaster brake, fixed gear, multi-cog or multi ring drivetrains
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