Soma Fabrications Track Kog

Yes, this cog uses the standard 1.37 inch x 24tpi threading, which is the industry standard for the vast majority of track hubs on the market.

It is built for both. The hardened CrMo steel construction is durable enough to handle the daily torque of street commuting, including skid-stopping, while being precise enough for velodrome use.

The phosphate finish is designed to resist corrosion and oxidation rather than act as a decorative paint. While the finish will naturally wear down where the chain makes contact with the teeth, the steel underneath remains protected and durable.

Your choice depends on your gear ratio preference. A smaller cog like a 14t or 15t will provide a higher gear for more speed on flats, while a larger 17t or 18t will make starting from a stop easier and provide more leverage for climbing.

Yes, you will need a standard cog tool or a chain whip to properly tighten the cog onto your hub threads. Always ensure it is seated fully before riding to prevent damage to your hub threads.