Alfa Romeo 4C Wheel Lug Pattern, Offset ET & Center Bore Reference
The Alfa Romeo 4C utilizes a specific wheel lug pattern to ensure proper fitment and performance. Its wheel lug pattern consists of 5 lug nuts arranged on a pitch circle diameter (PCD) of 110 mm. This configuration is critical for selecting compatible aftermarket and replacement wheels.\n\nWheel offset (ET) varies slightly depending on the model year and rim width but generally ranges between ET35 and ET40. Proper offset is essential to maintain clearance with brakes and suspension components while preserving the vehicle's handling characteristics.\n\nThe center bore of the Alfa Romeo 4C wheels is 70.3 mm, which aligns with the hub diameter to ensure wheels mount securely and reduce vibration. Rim sizes commonly span from 17 to 18 inches in diameter and 7 to 8.5 inches in width, matching the sporty design and performance orientation of the 4C.\n\nFor enthusiasts and owners seeking the correct wheel fitment, consulting the year-specific lug pattern, offset, and center bore data guarantees compatibility and safety.
| Make / model / trim | Year | Tire | Rim width (in) | Rim diam. (in) | Bolt pattern | Offset ET | Bore DIA | Mounting |
|---|---|---|---|---|---|---|---|---|
| Alfa Romeo 4C 1.8 TBi | 2020 | 205/40R17 | 7 | 17 | 5×98 | 33 | 58.1 | M12*1.25 |
| Alfa Romeo 4C 1.8 TBi | 2019 | 205/40R17 | 7 | 17 | 5×98 | 33 | 58.1 | M12*1.25 |
| Alfa Romeo 4C 1.8 TBi | 2018 | 205/40R17 | 7 | 17 | 5×98 | 33 | 58.1 | M12*1.25 |
| Alfa Romeo 4C 1.8 TBi | 2017 | 205/40R17 | 7 | 17 | 5×98 | 33 | 58.1 | M12*1.25 |
| Alfa Romeo 4C 1.8 TBi | 2016 | 205/40R17 | 7 | 17 | 5×98 | 33 | 58.1 | M12*1.25 |
| Alfa Romeo 4C 1.8 TBi | 2015 | 205/40R17 | 7 | 17 | 5×98 | 33 | 58.1 | M12*1.25 |
| Alfa Romeo 4C 1.8 TBi | 2014 | 205/40R17 | 7 | 17 | 5×98 | 33 | 58.1 | M12*1.25 |
| Alfa Romeo 4C 1.8 TBi | 2013 | 205/40R17 | 7 | 17 | 5×98 | 33 | 58.1 | M12*1.25 |
FAQ
- What is the Alfa Romeo 4C wheel lug pattern specification?
- The Alfa Romeo 4C uses a 5×110 mm lug pattern, meaning 5 lug nuts spaced on a 110 mm pitch circle diameter.
- What offset (ET) range is typical for Alfa Romeo 4C wheels?
- The wheel offset for the Alfa Romeo 4C generally ranges from ET35 to ET40 depending on the year and wheel size.
- What is the center bore diameter for Alfa Romeo 4C wheels?
- Alfa Romeo 4C wheels have a center bore of 70.3 mm to ensure proper hub fitment.
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 |