The tire sizes of Mercury Grand Marquis from 1983 through 2011 include 205/75R15, 215/70R15, 215/75R14, 215/75R15 and 225/60R16. Other sizes include 225/60R17, 225/70R15 and 225/75R14. Tire size depends on the year and rim diameter of the vehicle.
The first three-digit number in Mercury Grand Marquis tire sizes stands for tire width in millimeters. The two-digit number after the slash symbolizes the aspect ratio. The last two-digit number denotes the rim diameter in inches. All Grand Marquis tires are radial, symbolized by "R." Tire size for 2009 through 2011 vehicles is 225/60R17. Tire size for 1998 through 2008 vehicles is 225/60R16. Tire sizes for 1995 through 1997 vehicles are 215/70R15 and 225/60R16, depending on the rim diameter. Tire sizes for 1993 through 1994 vehicles are 215/70R15 and 225/70R15. Tire sizes for 1988 through 1992 vehicles are 215/70R15. Tire sizes for 1986 through 1987 vehicles are 205/75R15, 215/70R15 and 225/70R15. Tire sizes for 1983 through 1984 vehicles are 205/75R15, 215/75R14 and 225/75R14. Tire sizes for 1985 vehicles are 205/75R15, 215/70R15, 215/75R14 and 215/75R15.