Biggest rear tires on stock 10 holes?

[93stang351w]

what are the biggest rear tires you can get on the stock 15" 10 holes??

 

[LT1Killa]

275/50/15's You may need to roll the lips a hair tho.

 

[89MustangGX]

275/50/15's You may need to roll the lips a hair tho.

That's WAY too big a tire for that rim. All that will do is bulge way out -- possibly give you less traction.

Stick with a stock sized tire for a stock sized rim.