Description

Precision-Engineered for Fixed-Gear Dominance

Crafted for serious track cyclists and urban fixed-gear riders, Surly’s Track Cogs deliver uncompromising performance where it matters most. Machined from hardened 415 chromoly steel, these cogs withstand intense pressure and repetitive force—ideal for velodrome sprints or demanding city commutes.

Universal Threading, Purpose-Built Design
Featuring industry-standard 1.375″ x 24 TPI right-hand threading (identical to BMX freewheels), this 17-tooth cog fits single-speed rear hubs in emergencies. However, we strongly advise pairing exclusively with track hubs for optimal safety and performance. Track-specific engineering ensures:
– Zero slippage during high-cadence efforts
– Perfect chain alignment under maximum torque
– Enhanced durability for brakeless setups

Why Choose Surly Over Standard BMX Cogs?

Feature Surly Track Cog Generic BMX Cog
Intended Use Track/fixed-gear ONLY Casual cruising
Material Aircraft-grade chromoly Basic carbon steel
Stress Rating High-impact sprint ready Moderate pedal force
Safety Focus Velodrome-certified design No load specifications

Note: Product images showcase finish/texture—actual color may vary slightly.

Install this velodrome-ready workhorse for confident acceleration on banked turns or reliable skid control during urban fixed-gear adventures. Remember: true track components belong on track hubs—don’t compromise your ride’s integrity.

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