Article C15.7.4

Crankshaft Manufacturing

Technical Regulations

Article C15.7.4

FIA Source

Crankshaft Manufacturing

Chapter: C15

In Simple Terms

F1 crankshafts must be made from iron-based alloy and cannot be welded where the main bearing journals connect front to back. Teams can use tungsten-based material for the counterweights that help balance the crankshaft's rotation.

  • Crankshafts must be constructed from iron-based alloy material
  • Welding is prohibited between front and rear main bearing journals
  • Counterweights are permitted to use tungsten-based material for added strength and weight optimization
Official FIA Text

Crankshafts manufactured from iron-based alloy. No welding permitted between front and rear main bearing journals. Crank counterweights may use tungsten-based material.

crankshaftiron-based alloymain bearing journalsweldingcounterweights
2026 Season Regulations