1971 Firebird Formula 400 tires

[Juanfran Formula 400]

Hello guys

I am not able to find the original tires size for the 71 Firebird Formula 400. Wheels are Rally II 15".

Someone could help me?

Many Thanks!

 

[melsg5]

the modern tire size is a 235/60x15 or if you want 225/70x15.

 

[Juanfran Formula 400]

Thanks melsg5 for your inconditional help!!