BLB Track Cog - Black

The BLB Track Cog is a simple, sturdy Cro-Mo steel fixed-gear cog for building a classic 1/8-inch drivetrain. It works just as well when assembling a new fixed gear as when replacing a worn cog or changing the gearing on a bike you already know well.

The cog is available from 13 to 20 teeth, giving you plenty of room to fine-tune your gearing. A smaller cog gives you a heavier gear, while a larger cog gives you an easier one. Even small changes are noticeable on a fixed gear, so going up or down a tooth can be a simple way to get the cadence to better suit how and where you ride.

The BLB Track Cog is made for 1/8-inch chains and has a BC 1.37" × 24 TPI thread, the standard used on many traditional fixed-gear hubs. Check that your hub has the correct cog thread and a separate lockring thread before ordering. Lockring not included.

This is the black version of BLB's classic steel cog. It has the same straightforward construction as the silver version, but suits a build where you'd rather keep the drivetrain dark and understated.

Quick Specs

• Type: Threaded fixed-gear cog
• Material: Cro-Mo steel
• Sizes: 13T, 14T, 15T, 16T, 17T, 18T, 19T and 20T
• For chain: 1/8"
• Thread: BC 1.37" × 24 TPI
• Fits: Fixed-gear hubs with a matching cog thread and a separate lockring thread
• Color: Black
• Lockring: Not included