Front Tire Size

Ive just gone through this issue myself. Pain in the ***. Thankfully i have a friend in the tire buisness . I have 17inch rims all way around 7inch wide with a 4inch back space. I have 245's by 50 on the rear and i tried 215/50's on the frt.To wide. I just got one to try a 205/45/ and it clears the lower aspect of the fender, JUST. This is a used tire so a new one will be a touch taller. I may have to trim just a touch of the fender. Hind sight, 17 on the back looks great but i could have saved time with 15s on the frt. More tire options JMO