SURLY Singleator Chain Tensioner - Black Compatio_Enriched The designs and materials have

The designs and materials have passed extensive life and ultimate strength tests

a native of South Africa

Nickel plated finish for corrosion resistance

Direct mount ring replaces the existing chainring and spider on 3-bolt GXP cranks

One oversized spindle to work across every bottom bracket standard

SURLY Singleator Chain Tensioner - Black Compatio_Enriched The designs and materials haveSurly 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