Fixed-gear bicycle

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A fixed-gear bicycle

An 18-tooth cog that attaches to the rear hub of fixed-gear bike

Track cogs are typically attached and removed from the hub by screwing them with a chain whip. This tool has a lockring spanner for securing a reverse threaded lockring against the cog.

In Australia, "fixed-wheel" is the normal term for the subject of this article — meaning the opposite of freewheel, and "fixed-gear" usually refers to a single-speed bicycle.

A fixed-gear bicycle (or fixed-wheel bicycle, sometimes known as a fixie) is a bicycle that has no freewheel, meaning it cannot coast, as the pedals are always in motion when the bicycle is moving.
The sprocket, or cog, is threaded or bolted directly to a fixed rear hub. When the rear wheel turns, the pedals turn in the same direction.^[1] This allows a cyclist to stop without using a brake, by resisting the rotation of the cranks, and also to ride in reverse.

Contents

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• 1 Uses
• 2 Advantages and disadvantages
• 3 Brakeless
  • 3.1 Technique
  • 3.2 Legality
• 4 Conversion
• 5 Competition
• 6 Maintenance and upkeep
• 7 Subculture
  • 7.1 Sweden
    • 7.1.1 Community
    • 7.1.2 Popularity factors
• 8 See also
• 9 References
• 10 External links