That sounds like a good number, I have a posting pasted below from someone running 15" with 235s: ______________________________________________
. . . I have 15-7 wheels with 235/ 60 on now they are 26.1in tall and hit the fender lips a little on big dips. I thought if I used 225/60 14 at 24.7 tall I could gain 1/12 in and only lose 1/2in in tread width. They should fit the Rally ll' s 14/6? Also will help drop the nose a little.