SUGINO GIGAS 1/8" NJS Cog
Chain Size: 1/2"x1/8"
Thread: BC1.37x24T.P.I.
Note: 12T is available in CrMo Steel or S3
12, 13, 14, 15 & 16T are made by High grade material GIGAS alloy with S3 (Super Smooth Surface)