SURLY Singleator Chain Tensioner - Black closeout adjustable attachment below your bike

adjustable attachment below your bike seat

safer and more user friendly option than conventional quick releases

more comfortable saddle

Air release valve to easily purge the bag of trapped air

SURLY Singleator Chain Tensioner - Black closeout adjustable attachment below your bikeSurly 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 Source: Quality