Just so you can see the steroid-silly look with Nitto drag radials 335s rear and 275s front on my older SPF:
Loved the grip both on a straight line and in the twisties, so when I got my next SPF, I thought 15s were really the way to go so opted for for a set of handcut GY slicks from Roger Straus, mounted on Vintage Wheels' BRM 15s for track work:
However, I really think 17s offer the best choice in rubber, IMHO. I just mounted a set of Nitto 555s 315s rear and 275s front onto PS Engineering wheels. Almost as good as the drag radials but don't pick up stones as badly. Everybody gives me hard time with having tires other than GY or BFG but these offer the best value. Great performance for a very reasonable cost.
