Article C15.7.4
Crankshaft Manufacturing
Technical Regulations
Article C15.7.4
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