Surly Fixed Gear Cog 15T 1/8″ Steel Silver
$10.40
Description
Surly Track Cog: Precision-Built for Competitive Cycling
Forged from 415-grade hardened chromoly steel, this 15-tooth cog delivers unmatched durability for high-intensity track cycling. Designed exclusively for track hubs (e.g., Phil Wood or Campagnolo), its 1-3/8″ x 24 TPI right-hand threads align with vintage BMX freewheel standards—but note: while technically compatible with single-speed rear hubs or BMX systems, prolonged use outside dedicated track applications risks accelerated wear.
Why Cyclists Choose This Cog
- Racing-Grade Toughness: Chromoly steel resists bending and fatigue during sprint training or velodrome competitions
- True Track Performance: Optimized chain engagement angles reduce slippage at 90+ RPM cadences
- Vintage Compatibility: Seamlessly integrates with classic fixed-gear setups using Shimano/SRAM-compatible spacing
| Feature | Surly Track Cog | Standard BMX Cog |
|---|---|---|
| Material | Hardened Chromoly Steel | Aluminum/Steel |
| Thread Standard | 1-3/8″ x 24 TPI RH | Varied (non-universal) |
| Max Torque Rating | 80 Nm | 50 Nm |
| Ideal Use Case | Velodrome Racing | Urban Commuting |
Best For: Competitive track cyclists seeking bulletproof components for criteriums or hour records. Not recommended for daily urban grinding due to specialized design trade-offs.
Specs at a Glance:
– Tooth Count: 15T
– Weight: 145g (vs avg 210g for aluminum BMX cogs)
– Backlash Clearanceance: 0.5mm +/-0.1mm (prevents chain skip under load)
Perfect upgrade for vintage Pashley track bikes or custom fixed-gear builds requiring ISO-standard threading without cassette complexity.
