Fixed Gear Bicycle Cog 13T–18T Carbon Steel Track Sprocket

Fixed Gear Bicycle Cog — 13T to 18T | Carbon Steel Track Bike Sprocket

Upgrade your fixed-gear or single-speed build with this precision-machined carbon steel cog and lock ring set. Available in 13T, 14T, 15T, 16T, 17T, and 18T tooth counts, this sprocket fits standard threaded rear hubs and pairs with a matching lock ring for a secure, rattle-free drivetrain. Whether you're building a new track bike or refreshing a worn drivetrain, this cog delivers consistent, reliable power transfer on every pedal stroke.

Key Specifications

• Material: Carbon Steel — tough, wear-resistant, and built for long-term use
• Cog Threading: B1.37″–24 (approx. 34.8 mm) — Right-hand / Clockwise
• Lock Ring Threading: B1.29″–24 (approx. 32 mm) — Left-hand / Counter-clockwise
• Full Height: Approx. 8 mm
• Available Tooth Counts: 13T, 14T, 15T, 16T, 17T, 18T
• Color Options: 6 finishes available to match your build aesthetic
• Compatibility: Standard fixed-gear / single-speed threaded rear hubs

Why Choose This Cog?

• ✔ Carbon steel construction resists stretching and wear for long-lasting drivetrain performance
• ✔ Multiple gear ratios — select the tooth count that best suits your riding style and terrain
• ✔ Secure lock ring system — counter-clockwise lock ring threads prevent back-pedaling from loosening the cog
• ✔ Universal fit — compatible with most standard fixed-hub threaded rear wheels
• ✔ Available in 6 color options — complement your frame and components

Perfect For

• Fixed-gear (fixie) track bikes
• Single-speed commuter bikes
• Velodrome and criterium training setups
• DIY bike builds and drivetrain upgrades

For guidance on bicycle safety and proper component maintenance, visit the U.S. Consumer Product Safety Commission — Bicycle Safety.

Frequently Asked Questions

Q: What tooth counts are available for these fixed gear bicycle cogs?

A: These fixed gear cogs are available in six tooth counts: 13T, 14T, 15T, 16T, 17T, and 18T. A smaller tooth count (e.g. 13T) provides a harder gear ratio suited to flat, high-speed riding, while a larger tooth count (e.g. 17T or 18T) offers an easier ratio that is more comfortable for hilly terrain or everyday commuting.

Q: What threading standard do these cogs use, and will they fit my hub?

A: The cog uses a right-hand (clockwise) B1.37″–24 thread (approx. 34.8 mm), which is the industry-standard threading for fixed-gear rear hubs. The lock ring uses a left-hand (counter-clockwise) B1.29″–24 thread (approx. 32 mm). This combination is compatible with the vast majority of standard fixed/track rear hubs on the market.

Q: What material are these cogs made from, and how durable are they?

A: These cogs are precision-machined from carbon steel, which provides excellent hardness and wear resistance. Carbon steel stands up well to the constant engagement of a fixed drivetrain, making it a dependable long-term choice for track bikes, commuters, and training setups alike.

Q: Do I need any special tools to install this cog and lock ring?

A: Installation requires a cog tool (or chain whip) to thread on the cog and a lock ring spanner to secure the lock ring. The cog threads on clockwise, and the lock ring threads on counter-clockwise — this opposing thread direction ensures the lock ring tightens during normal pedaling, keeping the cog securely in place.