Article C9.6.4

Gear Ratio Pair Materials

Technical Regulations

Article C9.6.4

FIA Source

Gear Ratio Pair Materials

Chapter: C9

In Simple Terms

F1 gearboxes must use steel for their gear ratio pairs, which are the interlocking gears that transfer power from the engine to the wheels. This material requirement ensures durability and consistency across all teams, preventing teams from gaining unfair advantages through exotic or lighter materials.

  • Gear ratio pairs must be constructed from steel material
  • This applies to the gears that transmit power through the gearbox
  • Steel is mandated to maintain competitive balance and reliability standards
  • All teams must comply with this material specification
Official FIA Text

Gear ratio pairs must be made from steel.

gear ratio pairssteel materialgearboxf1 regulationspower transmission
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