Spider - 105 & 115 Series (1966-1994)
I know I have seen several threads on tires here.
It seems search is not working for me.
Putting a set of Ronal Basket-Weave 6x14" on the '79 Spider.
It currently has 205/60 on the original rims which I believe are 5.5" wide.
Looking at tire charts it seems 225/60 is an exact diameter match...