F1 History Question

[Streetrod]

Hi guys, was wondering if you all could help. I have welcomed the reintroduction of slicks this year but in what year were slicks first used in F1?

[FourWheelDrift]

Goodyear brought slick racing tyres to F1 in 1970.

[Streetrod]

FourWheelDrift said:

Goodyear brought slick racing tyres to F1 in 1970.

Thanks