The reason is that the ratio between combustion and electric power changes, which means more fuel is used. But larger tanks cannot fit under the current chassis, the BBC reports.
So, to avoid building new chassis to accommodate larger fuel tanks, the races are shortened so everyone can reach the finish line without running out of fuel.
Also new for 2027 is that the rule on how long races can be when there are weather and accident interruptions will be more flexible. You can wait longer to restart in evening races where you race in headlights, than in daytime races where the sun is about to set.
Corrected: In a previous version, inaccuracies were stated regarding gasoline in the F races.
