Mercury Grand Marquis Tire and Rim Size Guide by Year and Trim

The Mercury Grand Marquis offers a range of tire sizes and rim dimensions that vary by model year and trim level. Common tire sizes include 235/75R15 and 225/70R15, with rim diameters typically ranging from 15 to 16 inches and widths from 7 to 7.5 inches.\n\nEarlier model years frequently used more uniform tire dimensions across trims, whereas later models may have included optional sport or premium packages affecting wheel size and tire markings. Understanding the specific tire markings such as width, aspect ratio, and diameter is essential for proper replacement and upgrade.\n\nWhen comparing trims, note that higher trims may feature wider rims for improved handling or aesthetic upgrades. Always check the sidewall markings and original equipment specifications to ensure compatibility and avoid clearance issues.\n\nFor practical guidance, refer to manufacturer data or trusted catalog references matching your Mercury Grand Marquis model year and trim to confirm exact tire and rim measurements before purchasing replacements or upgrades.

Year
Make / model / trim Year Tire size Wheel
Mercury Grand Marquis 4.6L V82005235/50R187" × 16"
Mercury Grand Marquis 4.6L V82004235/50R187" × 16"
Mercury Grand Marquis 4.6L V82003235/50R187" × 16"

For bolt pattern (PCD), offset ET, center bore, and mounting details, open the bolt pattern page for Mercury Grand Marquis.

FAQ

What tire sizes are common on the Mercury Grand Marquis?
Common tire sizes include 235/75R15 and 225/70R15, varying with model year and trim.
How do rim widths differ between Mercury Grand Marquis trims?
Higher trims often have wider rims, typically between 7 and 7.5 inches, to enhance performance and appearance.
Why is it important to match tire size by model year and trim?
Matching tire size ensures proper fitment, safety, and maintains vehicle handling characteristics.
Tire size calculatorShow

Compare two tire sizes — diameter, speedometer error, and clearance change.

inchmm
Size 1Size 2DiffDiff(%)
Diameter25.0"25.4"0.5"1.89%
Width7.7"8.5"0.8"10.26%
Circumference78.4"79.9"1.5"1.86%
Profile height5.0"4.2"-0.7"-15.08%
Turnover per mile80779314-1.73%
Clearance--+0.2"-
25.0"
7.7"
old tire side
25.5"
8.5"
new tire side
old tire
15"
old rim
5.0"
new tire
17"
new rim
4.2"

Speedometer Error

(First wheel OEM size)

Reading20 mph30 mph40 mph50 mph60 mph70 mph80 mph90 mph
Actual20.430.540.750.961.171.281.491.6