Singleator Chain Tensioner

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Description | The Surly Singleator is a chain tensioner made for single speed setups using frames with vertical dropouts. It mounts directly to a derailleur hanger and gives riders a simple and adjustable way to take up excess chain slack when a frame does not allow traditional chain tension adjustment. Surly developed it for single speed drivetrains and describes it as one of its original products for riders getting into derailleur free bikes. The main body is forged for strength, and the design includes a triple sealed spring, chain guides, a floating pulley, a stainless steel pivot bushing, and a fully adjustable chainline. Features | Mounts to a derailleur hanger for vertical dropout single speed drivetrains Forged main body for strength Triple sealed spring design Fully adjustable chainline Floating pulley and chain guides Stainless steel pivot bushing 11 tooth pulley for smooth and quiet operation Works with both 1/8 inch and 3/32 inch chains Includes two springs for upward or downward tension adjustment Specs | Model Singleator Brand Surly Product Type Chain tensioner Mounting Derailleur hanger mount Main Body Forged Spring Triple sealed Chainline Adjustment Fully adjustable Pulley Floating 11 tooth pulley Pivot Bushing Stainless steel Chain Compatibility 1/8 inch and 3/32 inch Included Springs Push down spring installed, push up spring included in packaging Not Compatible With Coaster brake, fixed gear, multi cog, or multi ring drivetrains Use Tensioning excess chain slack on vertical dropout single speed drivetrains Show more