Smart Roadster Coupe Wheel Lug Pattern, Offset ET & Rim Size Reference
The Smart Roadster Coupe features a specific wheel lug pattern that ensures perfect fitment for replacement wheels and tires. The lug pattern consists of the lug count and the pitch circle diameter (PCD) measured in millimeters, paired with the appropriate offset (ET) and center bore dimensions.\n\nWheel sizes for the Smart Roadster Coupe vary slightly depending on the production year, but common rim diameters ranged typically from 15 to 16 inches. Accurate wheel fitment requires prioritizing the correct lug pattern and offset to maintain vehicle safety and performance.\n\nThis reference guide provides year-sorted details of the Smart Roadster Coupe’s wheel lug pattern specifications, including offset (ET) values and center bore sizes. Use these specifications to select compatible wheels that maintain proper clearance and handling characteristics.\n\nEnsure that any aftermarket wheels match the original mounting specs to avoid installation issues and maintain optimal driving dynamics for your Smart Roadster Coupe.
| Make / model / trim | Year | Tire | Rim width (in) | Rim diam. (in) | Bolt pattern | Offset ET | Bore DIA | Mounting |
|---|---|---|---|---|---|---|---|---|
| Smart Roadster Coupe 0.7 | 2005 | 185/55R15 | 5 | 15 | 3×112 | 40 | 66.6 | M12*1,5 |
| Smart Roadster Coupe 0.7 Brabus | 2005 | 185/55R15 | 5 | 15 | 3×112 | 40 | 66.6 | M12*1,5 |
| Smart Roadster Coupe 0.7 | 2004 | 185/55R15 | 5 | 15 | 3×112 | 40 | 66.6 | M12*1,5 |
| Smart Roadster Coupe 0.7 Brabus | 2004 | 185/55R15 | 5 | 15 | 3×112 | 40 | 66.6 | M12*1,5 |
| Smart Roadster Coupe 0.7 | 2003 | 185/55R15 | 5 | 15 | 3×112 | 40 | 66.6 | M12*1,5 |
| Smart Roadster Coupe 0.7 Brabus | 2003 | 185/55R15 | 5 | 15 | 3×112 | 40 | 66.6 | M12*1,5 |
FAQ
- What is the lug pattern for the Smart Roadster Coupe?
- The Smart Roadster Coupe typically uses a 5 lug × 112 mm pitch circle diameter (PCD) wheel lug pattern.
- What does offset ET mean for Smart Roadster Coupe wheels?
- Offset ET refers to the distance between the wheel’s mounting surface and its centerline, crucial for proper wheel positioning on the Smart Roadster Coupe.
- Why is the center bore size important for Smart Roadster Coupe wheels?
- The center bore ensures the wheel fits snugly onto the hub, preventing vibrations and ensuring safe and secure mounting for the Smart Roadster Coupe.
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 |