Alfa Romeo 4C Spider Wheel Lug Pattern, Offset & Rim Size Reference
The Alfa Romeo 4C Spider features a specific wheel lug pattern, offset, center bore, and rim size specifications that vary slightly by model year. Accurate wheel fitment is critical for maintaining the vehicle's performance and safety.\n\nThe wheel lug pattern for the Alfa Romeo 4C Spider is primarily 4x98 mm (4 lug nuts spaced on a 98 mm pitch circle diameter). The offset (ET) typically ranges from ET33 to ET38 depending on the year and specific wheel design. The center bore is 56.6 mm.\n\nRim sizes for the 4C Spider generally vary from 18 to 19 inches in diameter, designed to accommodate performance tires and maintain the original driving dynamics. When selecting wheels, it's important to consider these parameters for proper fitment and clearance.\n\nOur catalog provides a year-sorted reference for Alfa Romeo 4C Spider wheel lug patterns, offsets, center bore diameters, and recommended rim sizes, enabling users to find compatible aftermarket or replacement wheels with confidence.
| Make / model / trim | Year | Tire | Rim width (in) | Rim diam. (in) | Bolt pattern | Offset ET | Bore DIA | Mounting |
|---|---|---|---|---|---|---|---|---|
| Alfa Romeo 4C Spider 1.8 TBi | 2019 | 205/40R17 | 7 | 17 | 5×98 | 33 | 58.1 | M12*1.25 |
| Alfa Romeo 4C Spider 1.8 TBi | 2018 | 205/40R17 | 7 | 17 | 5×98 | 33 | 58.1 | M12*1.25 |
| Alfa Romeo 4C Spider 1.8 TBi | 2017 | 205/40R17 | 7 | 17 | 5×98 | 33 | 58.1 | M12*1.25 |
| Alfa Romeo 4C Spider 1.8 TBi | 2016 | 205/40R17 | 7 | 17 | 5×98 | 33 | 58.1 | M12*1.25 |
| Alfa Romeo 4C Spider 1.8 TBi | 2015 | 205/40R17 | 7 | 17 | 5×98 | 33 | 58.1 | M12*1.25 |
| Alfa Romeo 4C Spider 1.8 TBi | 2014 | 205/40R17 | 7 | 17 | 5×98 | 33 | 58.1 | M12*1.25 |
FAQ
- What is the lug pattern for the Alfa Romeo 4C Spider?
- The Alfa Romeo 4C Spider uses a 4x98 mm lug pattern, meaning it has 4 lug nuts spaced on a 98 mm pitch circle diameter.
- What offset (ET) values are common for 4C Spider wheels?
- Typical offset values for Alfa Romeo 4C Spider wheels range from ET33 to ET38, varying by model year and wheel design.
- What is the center bore size of Alfa Romeo 4C Spider wheels?
- The center bore diameter for Alfa Romeo 4C Spider wheels is 56.6 mm, ensuring proper hub fitment and wheel balance.
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 |
