ALTA Track Fixed Cog 16T × 1/8 Chrome | Steel Sprocket | ISO 1.37×24 TPI | For Fixed-Gear / Track / Flip-Flop (Fixed Side).

🧾 Core Specs 

• Type / Use: Fixed-gear (track) cog — threads onto a fixed hub and is secured with a left-hand (reverse) lockring. (Not a freewheel, not a cassette cog.)

• Gearing: 16T — classic all-round fixed ratio choice; easier starts than 13T but still quick on flats.

• Chain Width: 1/8" (wide SS/track chain).

• Material: Heat-treated steel, chrome plated for corrosion resistance and a polished look.

• Cog Threading: ISO/BSA 1.37" × 24 TPI, right-hand — modern standard for fixed cogs.

• Lockring Spec (required): ISO 1.29" × 24 TPI, left-hand (not included unless noted).

  • Heads-up: Some vintage Italian pista hubs use 1.32" × 24 TPI LH lockrings — buyers must confirm.

• Brand: ALTA

• Speeds: Single (fixed only)

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📦 What’s Included

• 1 × 16T × 1/8 steel fixed cog (chrome).

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🛠️ Installation & Setup (buyer-friendly)

1. Confirm hub standards: 1.37"×24 TPI cog thread + ISO 1.29"×24 TPI LH lockring thread.

2. Clean and lightly grease hub threads and cog face.

3. Thread cog clockwise until seated; snug with a chain whip.

4. Thread lockring counter-clockwise (left-hand); tighten firmly with a lockring tool.

5. Set chainline (typical track 42–44 mm), tension chain, check tight spots.

6. Re-check lockring after the first ride.

   • Safety: Fixed means no coasting—use a strong front brake for road use.

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⚙️ Construction & Fit Details

• Tooth Profile: 1/8" track/SS profile for strong chain engagement and reduced skip.

• Finish: Durable chrome plating resists rust and cleans up easily.

• Compatibility (hubs/wheels): Fixed hubs and flip-flop wheels on the fixed side with ISO threads.

• Compatible Chains: 1/8" only (use a quality single-speed/track chain).

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📊 Gear Ratio Guidance (why 16T is popular)

• Common, versatile pairings (ratio ≈ front ÷ rear):

  • 44×16 = 2.75 — friendly for learning/hilly commutes

  • 46×16 = 2.88 — city/commuter sweet spot

  • 48×16 = 3.00 — classic all-round track/road fixed

  • 50×16 = 3.13 — faster on flats

• Rule of thumb: Bigger front ring = faster; smaller = easier.

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🚲 Compatibility Examples*

(Model/year dependent — buyers should verify cog & lockring threads.)

• Hubs/Wheels: Formula/Weinmann, Novatec, Origin8, All-City, Gran-Compe, Miche (ISO versions), Phil Wood (ISO), DT Swiss track, many State/Pure/6KU/Retrospec flip-flop fixed sides.

• Bikes: State Bicycle Co., Pure Cycles, 6KU, Retrospec, All-City, Fuji Track/Declaration, SE Draft, Aventon Mataro, Bianchi/Cinelli pista (ISO).