Pirelli has justified its decision to introduce a 'super hard' compound into its range of 2018 tyres as insurance against next year's car development.
The Italian manufacturer, which has been Formula 1's exclusive supplier since 2011, introduced the superhard and hypersoft tyres at each end of its compound spectrum.
But F1 teams doubt the former will ever been seen in 2018.
"Quite simply, it's our insurance," Pirelli boss Mario Isola told Speed Week.
"Basically, we assume we will never use the super hard tyre. But it's still difficult for us to assess how quickly these new cars will be developed, and whether some corners could become critical."
"The hard tyre is enough on the circuits that put the tyres through a lot, but according to the regulations we may add another compound during the season. It's better to be safe than sorry," Isola added.
Gallery: The beautiful wives and girlfriends of F1 drivers
Keep up to date with all the F1 news via Facebook and Twitter
Max Verstappen admitted his surprise at securing the sprint pole position at the Miami Grand…
Max Verstappen managed to take pole position for Saturday's Miami GP Sprint race, but the…
Full results from Sprint qualifying for the Miami Grand Prix at Miami International Autodrome, round…
Amidst the ongoing saga surrounding Adrian Newey's departure from Red Bull, team boss Christian Horner…
It’s likely a long shot for Williams, but team principal James Vowles has revealed that…
Red Bull’s Max Verstappen set the fastest time in Friday’s single practice for the Miami…