MKS Chain Tensioners NJS for Track Bike Frame MIJ Fixed Gear Kierin
MKS CA- NJS Chain Tensioners For 5mm dropout/ 10mm axle Mint condition. Open box but never used Includes instructions and Allen key
MKS CA- NJS Chain Tensioners For 5mm dropout/ 10mm axle Mint condition. Open box but never used Includes instructions and Allen key