Surly

Singleator Single-Speed Chain Tensioner - Black

The Surly Singleator Single-Speed Chain Tensioner keeps single-speed setups running tight, quiet, and hassle-free. Designed for bikes with vertical dropouts, this clever tensioner mounts directly to a standard derailleur hanger and instantly takes the guesswork out of chain tension. Whether converting a geared frame or keeping an existing single-speed dialed, it delivers Surly’s signature mix of simplicity and durability in one tough little package.

A forged body and stainless-steel pivot bushing provide the kind of long-term reliability that riders expect from Surly, while a triple-sealed spring and floating 11-tooth pulley keep things running smooth and silent mile after mile. Chainline is fully adjustable, and the included springs let riders choose either upward or downward tension to suit their setup.

Key Features:

• Mounts directly to a standard derailleur hanger for easy single-speed conversions
• Forged body and stainless-steel pivot bushing for lasting performance
• Triple-sealed spring and chain guides for consistent, quiet operation
• Compatible with both 1/8" and 3/32" chains
• Includes two springs for upward or downward tension adjustment
• Not for use with coaster brakes, fixed gears, or multi-cog/multi-ring drivetrains

From trail builds to urban conversions, the Surly Singleator is the go-to choice for riders who want simple, reliable chain tension without compromises.