Surly Singleator Spring loaded Chain tensioner Black

To spread the gospel of singlespeedery, we developed the 1x1 Singleator. It was one of our first products and we still really like it a lot. Over the years, it’s been many a singlespeeder’s first foray into a derailleur-free lifestyle.

The 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 singlespeed drivetrains. The Singleator features a triple-sealed spring, large cog capacity, chain guides, fully-adjustable chain line, floating pulley, and a stainless-steel pivot bushing. The main body is forged, so it’s strong. We’ve gone with an 11-tooth pulley for smooth, quiet operation. And it now works with both 1/8" (BMX) and 3/32" (geared bikes) chains. Beware impostors; the Singleator is the granddaddy and outperforms all others.