SUGINO SSG144 AA (NJS) W/Header 48S Chain Ring, SilverRacing standard loved by KEIRIN, World Cup and other players around the world.Features of SUGINO SSG144 AA (NJS) W/Header 48S Chain Ring, Silver P.C.D: 5.7 inches (144 mm); Chain Size: 1/2" x 1/8"; Surface Finish: Anodized (NJS Certified) | silver anodizedSpecification of SUGINO SSG144 AA (NJS) ..