2017 Alfa Romeo 4C Bolt Pattern & Tire Size
The 2017 Alfa Romeo 4C OEM tire size, bolt pattern, and wheel specifications are listed below. All data is based on industry-standard OEM reference specifications.
The 2017 Alfa Romeo 4C has a 5x98 bolt pattern, an OEM tire size of 205/45R17, and a 58.1mm center bore.
2017 Alfa Romeo 4C Engine & Trim Levels
Detailed tire and wheel breakdown for the 2017 Alfa Romeo 4C
Tire geometry â 205/45R17
The 205/45R17 fitted to the 2017 Alfa Romeo 4C has a section width of 205mm and an aspect ratio of 45%, mounted on a 17-inch rim. That gives a sidewall height of 92.3mm (3.63") and an overall outside diameter of 616.3mm (24.26"). At highway speed this tire completes roughly 516 revolutions per kilometre, which is what your speedometer and odometer are calibrated against.
Plus-sizing window
If you want to upsize wheels on the 2017 Alfa Romeo 4C while keeping the speedometer accurate, target a 215/37R18 (plus-one). For a softer ride or winter setup, a 195/54R16 (minus-one) keeps the overall diameter within Âą3% of stock, which is the industry tolerance for ABS and stability control to stay calibrated.
Wheel fitment specs
The 2017 Alfa Romeo 4C uses a 5x98 bolt pattern with a 58.1mm hub bore. Safe rim width range for the OEM tire is 6.5J â 7.5J, and offsets in the ET28 â ET38 window will clear suspension and fender without rubbing on most setups.
Staggered setup notes
The 2017 Alfa Romeo 4C ships staggered: 205/45R17 up front and 235/40R18 on the rear. That is a 235mm vs 205mm width difference â do not rotate front-to-rear, and replace tires in axle pairs to keep ABS and traction control balanced.
Tire pressure guidance
Manufacturer-recommended cold tire pressure for the 2017 Alfa Romeo 4C is printed on the driver-side door jamb sticker â always defer to that value, not to the maximum pressure printed on the tire sidewall. Check pressure monthly and before long trips; under-inflation by 20% can reduce tread life by 25%.
OEM Wheel & Tire Specs
| Engine & Trim | Tire Size | Rim Size | Offset (ET) | |
|---|---|---|---|---|
| 1.75 TBi Coupe | Rear: 235/40R18 | 17x7.0J | ET33 | |
| 1.75 TBi Spider / Racing Package | Rear: 235/35R19 | 18x7.0J | ET33 |
Frequently Asked Questions
What tire size does the 2017 Alfa Romeo 4C 1.75 TBi Coupe use?
The 2017 Alfa Romeo 4C 1.75 TBi Coupe uses 205/45R17 tires as standard equipment.
What tire size does the 2017 Alfa Romeo 4C 1.75 TBi Spider / Racing Package use?
The 2017 Alfa Romeo 4C 1.75 TBi Spider / Racing Package uses 205/40R18 tires as standard equipment.
What is the bolt pattern of the 2017 Alfa Romeo 4C?
The 2017 Alfa Romeo 4C has a 5x98 bolt pattern with a center bore of 58.1mm.
What is the wheel offset of the 2017 Alfa Romeo 4C?
The 2017 Alfa Romeo 4C has a wheel offset of ET33.
Other Vehicles with 5x98 Bolt Pattern
The following vehicles share the same 5x98 bolt pattern as the 2017 Alfa Romeo 4C, making wheel interchangeability possible (verify offset and center bore before swapping).