Article 4D

Front Axles (Inboard of the contact surface with the wheel spacer) and bearings

Technical Regulations

Article 4D

FIA Source

Front Axles (Inboard of the contact surface with the wheel spacer) and bearings

Chapter: C10.6

In Simple Terms

This rule covers the internal design of the front axle - specifically the parts you can't see from outside, including the axle shaft, bearings, and how they connect to the brake system. Teams must follow strict specifications for how these components are shaped and positioned to ensure fair competition and safety.

  • Regulates the internal geometry of front axles hidden behind wheel spacers and bearings
  • Controls the interface between the axle assembly and brake disc bell mounting
  • Specifies bearing design, spacing, and positioning requirements
  • Ensures standardized suspension geometry for competitive fairness
Official FIA Text

Axle geometry lying inboard of the contact surface with the wheel spacers and wheel bearing assembly. Axle geometry lying inboard of the contact surface with the wheel spacers, wheel bearings and spacers, interface and mounting to the brake disc bell.

front axlewheel bearingwheel spacerbrake discsuspension geometry
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