Stock tire size?

Don't beat me too badly for asking what to many of you is common knowledge but what size tire came stock on 85-87 t-type Regals? I believe stock rim size was 15 inches?

 

Uh, maybe I found my own answer. How does 215r65 sound?

 

yea good answer, if your looking to upgrade a 235/60/15 is approx the same height with a little more width,