BLB Track Sprocket - 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 putting together 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 with 13 to 20 teeth, giving you plenty of room to fine-tune your gearing. A smaller cog gives you a harder 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 an easy way to get the cadence to better suit how and where you ride.

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

This is the black version of BLB's classic steel cog. It has the same straightforward construction as the silver version, but is for 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 matching cog threads and a separate lockring
• Color: Black
• Lockring: Not included