Article C10.9.1

Wheel Attachment

Technical Regulations

Article C10.9.1

FIA Source

Wheel Attachment

Chapter: C10

In Simple Terms

Each wheel on an F1 car must be attached using just one fastener (bolt). That fastener can't be bigger than 105mm in diameter or longer than 75mm, and its only job is to hold the wheel to the car.

  • Single fastener requirement - only one bolt per wheel is allowed
  • Size restrictions - fastener diameter maximum 105mm, axial length maximum 75mm
  • Dedicated purpose - the fastener can only be used to attach the wheel assembly to the car
Official FIA Text

Wheel must be attached with single fastener. Fastener outer diameter not exceed 105mm, axial length not exceed 75mm. Fastener may only attach wheel assembly to car.

wheel attachmentfastenersingle boltwheel assembly105mm diameter
2026 Season Regulations