Mercury Grand Marquis Wheel Lug Patterns, Offset, and Center Bore Reference
The Mercury Grand Marquis features specific wheel lug patterns defined by its lug count and pitch circle diameter (PCD), essential for proper wheel fitment. Across various production years, the Grand Marquis typically employs a 5×114.3 mm lug pattern, providing a stable and secure connection between wheel and hub.\n\nWheel offset (ET) values for the Mercury Grand Marquis generally range between ET35 and ET45, ensuring optimal positioning of the wheel relative to the suspension and fender. The center bore is commonly 73.1 mm, matching the hub diameter for an accurate fit without vibrations.\n\nRim sizes compatible with the Grand Marquis vary depending on the model year and trim, often spanning 15 to 17 inches in diameter. Selecting wheels that meet the specified lug pattern, offset, and center bore is crucial for maintaining vehicle safety and performance.\n\nOur year-sorted Mercury Grand Marquis wheel lug pattern reference table offers a detailed overview for each model year, assisting in identifying the correct specifications when choosing replacement wheels or tires.
| Make / model / trim | Year | Tire | Rim width (in) | Rim diam. (in) | Bolt pattern | Offset ET | Bore DIA | Mounting |
|---|---|---|---|---|---|---|---|---|
| Mercury Grand Marquis 4.6L V8 | 2005 | 235/50R18 | 7 | 16 | 5×114.3 | 45 | 70.5 | M12*1,5 |
| Mercury Grand Marquis 4.6L V8 | 2004 | 235/50R18 | 7 | 16 | 5×114.3 | 45 | 70.5 | M12*1,5 |
| Mercury Grand Marquis 4.6L V8 | 2003 | 235/50R18 | 7 | 16 | 5×114.3 | 45 | 70.5 | M12*1,5 |
FAQ
- What is the standard wheel lug pattern for the Mercury Grand Marquis?
- The Mercury Grand Marquis typically uses a 5×114.3 mm lug pattern across most model years.
- Why is wheel offset (ET) important for the Grand Marquis?
- Proper offset ensures the wheel is correctly positioned without causing interference with suspension components or the fender.
- Can I use wheels with a different center bore on the Mercury Grand Marquis?
- Using wheels with a mismatched center bore can cause vibrations; it’s best to use wheels with a 73.1 mm center bore or use hub-centric rings.
Tire size calculatorShow
Compare two tire sizes — diameter, speedometer error, and clearance change.
| Size 1 | Size 2 | Diff | Diff(%) | |
|---|---|---|---|---|
| Diameter | 25.0" | 25.4" | 0.5" | 1.89% |
| Width | 7.7" | 8.5" | 0.8" | 10.26% |
| Circumference | 78.4" | 79.9" | 1.5" | 1.86% |
| Profile height | 5.0" | 4.2" | -0.7" | -15.08% |
| Turnover per mile | 807 | 793 | 14 | -1.73% |
| Clearance | - | - | +0.2" | - |
Speedometer Error
(First wheel OEM size)
| Reading | 20 mph | 30 mph | 40 mph | 50 mph | 60 mph | 70 mph | 80 mph | 90 mph |
|---|---|---|---|---|---|---|---|---|
| Actual | 20.4 | 30.5 | 40.7 | 50.9 | 61.1 | 71.2 | 81.4 | 91.6 |