Smart Forfour Wheel Lug Patterns, Offset ET & Center Bore Reference
The Smart Forfour features specific wheel lug patterns that vary slightly depending on the production year and model version. Key parameters include lug count × PCD (pitch circle diameter in millimeters), offset ET, and center bore diameter. These specifications ensure a proper and secure wheel fitment.\n\nGenerally, the Smart Forfour uses a 4-lug pattern with a PCD of 100 mm. Offset ET values typically range between 35 mm and 45 mm, with the center bore accommodating 54.1 mm. Rim sizes commonly compatible with the Forfour range from 15 to 17 inches, balancing style and performance.\n\nFor accurate wheel replacement or upgrade, referencing the correct lug pattern and offset is essential to maintain safety and vehicle handling. This site provides a year-sorted reference table listing these specifications for all Smart Forfour models, supporting precise and smart wheel fitment choices.
| Make / model / trim | Year | Tire | Rim width (in) | Rim diam. (in) | Bolt pattern | Offset ET | Bore DIA | Mounting |
|---|---|---|---|---|---|---|---|---|
| Smart Forfour 1.1 | 2006 | 175/65R14 | 5.5 | 14 | 4×114.3 | 45 | 67.1 | M12*1,5 |
| Smart Forfour 1.3 | 2006 | 175/65R14 | 5.5 | 14 | 4×114.3 | 45 | 67.1 | M12*1,5 |
| Smart Forfour 1.5 | 2006 | 175/65R14 | 5.5 | 14 | 4×114.3 | 45 | 67.1 | M12*1,5 |
| Smart Forfour 1.5 BRABUS | 2006 | 175/65R14 | 5.5 | 14 | 4×114.3 | 45 | 67.1 | M12*1,5 |
| Smart Forfour 1.5 CDI | 2006 | 175/65R14 | 5.5 | 14 | 4×114.3 | 45 | 67.1 | M12*1,5 |
| Smart Forfour 1.1 | 2005 | 175/65R14 | 5.5 | 14 | 4×114.3 | 45 | 67.1 | M12*1,5 |
| Smart Forfour 1.3 | 2005 | 175/65R14 | 5.5 | 14 | 4×114.3 | 45 | 67.1 | M12*1,5 |
| Smart Forfour 1.5 | 2005 | 175/65R14 | 5.5 | 14 | 4×114.3 | 45 | 67.1 | M12*1,5 |
| Smart Forfour 1.5 BRABUS | 2005 | 175/65R14 | 5.5 | 14 | 4×114.3 | 45 | 67.1 | M12*1,5 |
| Smart Forfour 1.5 CDI | 2005 | 175/65R14 | 5.5 | 14 | 4×114.3 | 45 | 67.1 | M12*1,5 |
| Smart Forfour 1.1 | 2004 | 175/65R14 | 5.5 | 14 | 4×114.3 | 45 | 67.1 | M12*1,5 |
| Smart Forfour 1.3 | 2004 | 175/65R14 | 5.5 | 14 | 4×114.3 | 45 | 67.1 | M12*1,5 |
| Smart Forfour 1.5 | 2004 | 175/65R14 | 5.5 | 14 | 4×114.3 | 45 | 67.1 | M12*1,5 |
| Smart Forfour 1.5 CDI | 2004 | 175/65R14 | 5.5 | 14 | 4×114.3 | 45 | 67.1 | M12*1,5 |
FAQ
- What is the common lug pattern for the Smart Forfour?
- The Smart Forfour typically uses a 4-lug pattern with a 100 mm pitch circle diameter (PCD).
- Why is offset ET important for Smart Forfour wheels?
- Offset ET ensures the wheels fit properly within the wheel arches, affecting handling and preventing rubbing against suspension components.
- Can I use wheels with a different center bore on my Smart Forfour?
- Wheels with a different center bore size may not fit securely. It's recommended to match the center bore (usually 54.1 mm) or use appropriate 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 |