My son has a 1991 Buick Skylark 2.5 Cid 4 Cyl. The car came with 185x75x14. The car was purchased new with that size tire on it, as indicated by the sticker on the door jam. If I remember correctly the OEM tires were Michelin. Well that size tire has been discontinued by most major manufactures. Their are still a few manufactures around BUT they are becoming more scarce as time goes by. I have done some research looking at some conversion charts BUT cannot come up with something that gives the EXACT revolution per mile or I feel comfortable that will not rub on the fender. Any suggestions appreciated!