Article C9.6.2
Gear Ratio Nomination and Changes
Technical Regulations
Article C9.6.2
Gear Ratio Nomination and Changes
Chapter: C9
In Simple Terms
Teams must decide their gear ratios before the season starts and tell the FIA. In 2026, they get one free chance to change them mid-season. From 2027 onwards, teams can adjust either the gear pairs OR the final drive during the season, but they can't change both at the same time.
- All gear ratios must be officially declared before the first race of the season
- 2026 is special: teams get exactly one opportunity to modify their ratios during the season
- From 2027 onwards: teams can change gear pairs OR final drive separately, but choosing one option locks out the other
- This rule prevents teams from constantly tweaking their drivetrain setup
Official FIA Text
Each F1 Team must nominate forward gear ratios declared to FIA technical delegate at first Competition. During 2026 only, ratios may be changed once during season. From 2027 onwards, changes may involve either gear ratio pairs or final drive, but not both.
gear ratiofinal drivedrivetrain2026 season2027 regulations
2026 Season Regulations