GIGAS 12T Pro-racing track cog, made of Cr-Mo steel in black finish

Specifications

• Chain Size : 1/2″ 1/8″
• Thread : BC1.37 24T
• Material: Cr-Mo steel
• Color : S3 , Black
• 12T-S3 is non-NJS.
• 12T-Black is NJS-approved but not S3.

*Please use this cog with specific lockring “GIGAS lockring for 12T”. As the cog is small, if used with a regular lockring, the chain will touch the lockring and potentially damage the lockring and sprocket.

SKU# GIGASBC-12S/BK