2015-2020 Alfa Romeo 4C Wheels: A Guide to Staggered Sizes, Offsets, and OEM Options
This complete guide covers the critical staggered wheel specifications, factory options, part numbers, and inspection points for the 2015-2020 Alfa Romeo 4C.
- The 4C uses a critical staggered setup; front and rear wheels are different sizes and are not interchangeable.
- There are two main factory size combinations: 17" front/18" rear, and optional 18" front/19" rear.
- The bolt pattern is an uncommon 5x98mm with a 58.1mm center bore; fitment must be exact.
- When buying a used wheel, the most important checks are for cracks and bends, and verifying it is for the correct axle (front or rear).
Understanding 2015-2020 Alfa Romeo 4C Wheels
The wheels for the 2015-2020 Alfa Romeo 4C are a fundamental part of its performance identity. Unlike many vehicles, the 4C relies on a staggered wheel and tire setup to manage its mid-engine dynamics. This means the front and rear wheels have different dimensions and are not interchangeable. Understanding these specifications is essential before purchasing a replacement.
Warning: The Alfa Romeo 4C uses a staggered setup. The front and rear wheels are different sizes. Always verify you are purchasing the correct wheel for the specific axle you need.
Technical Specifications
Correct fitment is critical for the safety and handling of the 4C. The bolt pattern is a relatively uncommon 5x98mm, and the center bore of 58.1mm must be exact to prevent vibrations. Using wheels with the incorrect offset can lead to rubbing against suspension components or fenders and may cause premature wheel bearing wear.
| Specification | Standard Wheels | Optional Wheels |
|---|---|---|
| Front Size | 17" x 7" | 18" x 7" |
| Rear Size | 18" x 8" | 19" x 8.5" |
| Front Offset (ET) | +33 mm | +33 mm |
| Rear Offset (ET) | +44 mm | +49 mm |
| Bolt Pattern (PCD) | 5x98 mm | |
| Center Bore | 58.1 mm | |
| Lug Bolt Spec | M12x1.25 | |
| Lug Bolt Torque | 98 Nm (72 ft-lb) | |
Factory Wheel Variants and Finishes
Alfa Romeo offered several wheel styles and finishes for the 4C throughout its production run. Identifying the correct wheel is key to maintaining the original look of the vehicle.
- Standard Cast Wheels: The base models came with 17/18-inch five-twin-spoke cast alloy wheels.
- Optional Forged Wheels: Lighter and stronger forged wheels were a popular option. These often came in an 18/19-inch diameter in styles like the 5-disc "Teledial" or a 10-spoke design.
- Finishes: Factory finishes included Silver, Powder Coat Charcoal (Gunmetal), Gloss Black, and Machined face with black accents. Special editions like the 33 Stradale Tributo had unique gold-finished wheels.
Known Issues, Recalls, and TSBs
The Alfa Romeo 4C has no major recalls or Technical Service Bulletins (TSBs) specifically related to wheel failure. Searches of the NHTSA database show no recalls for cracked or structurally unsound wheels. One notice was issued for a misprinted tire information label in Canada, but this does not relate to the physical safety of the wheel itself.
Owners report that the car is very sensitive to tire pressure and wheel alignment. Any vibrations or handling issues should be investigated immediately, starting with wheel balance and alignment. Due to the car's stiff suspension and lightweight nature, bent wheels from pothole impacts can be a concern.
Buying a Used 2015-2020 Alfa Romeo 4C Wheel
A used OEM wheel is often the best choice for replacement, as it guarantees proper fitment, material quality, and weight, which are all crucial for the 4C's handling. Aftermarket wheels, especially inexpensive cast versions, can be heavier than the factory forged options, negatively impacting the car's responsive feel.
Pro Tip: Many OEM 4C wheels were made by Cromodora and are forged, making them both strong and lightweight. When buying used, try to confirm if the wheel is the desirable forged version.
Inspection Checklist for a Used Wheel:
- Verify Front vs. Rear: This is the most important step. Check the size (diameter and width) stamped on the back of the wheel to ensure it matches the axle you need it for.
- Check for Bends: Place the wheel on a flat surface and check both the inner and outer lips for any visible bends or flat spots. A bent wheel will cause vibrations that are impossible to balance out.
- Inspect for Cracks: Carefully examine the entire wheel, especially the inner barrel and around the spokes, for hairline cracks. Cracks are a major safety hazard and cannot always be safely repaired.
- Look for Previous Repairs: Check for signs of welding on the back of the wheel. While some weld repairs can be done correctly, they can also indicate a weak spot. Also, look for uneven paint or texture, which may hide body filler from a cosmetic repair.
- Assess the Finish: Check for heavy curb rash, peeling clear coat, or deep scratches. While cosmetic, refinishing a wheel can be costly and it can be difficult to perfectly match the original factory color.
Verifying Paint and Finish
Wheels are not matched using the vehicle's body paint code. The body paint code for an Alfa Romeo 4C is typically found on a sticker inside the trunk area. To match a wheel, you must identify it by its style (e.g., "10-spoke") and finish name (e.g., "Powder Coat Charcoal" or "Silver"). The best way to ensure a match is to compare the wheel you are buying directly to your existing wheels or to use the OEM part number.
Cost of Replacing an Alfa Romeo 4C Wheel
The cost can vary significantly based on the type, size, and condition of the wheel.
| Part Type | Estimated Cost (per wheel) |
|---|---|
| New OEM | $600 - $900+ (Varies by dealer and style) |
| New Aftermarket (High-End Forged) | $1,200 - $1,500+ |
| Used OEM | $300 - $550 |
| Remanufactured/Reconditioned OEM | $400 - $550 |
| Shop Labor (Mount, Balance, TPMS Swap) | $40 - $75 |
Frequently Asked Questions
Can I put the same size wheels on the front and back (a "square" setup)?
It is not recommended. The Alfa Romeo 4C was engineered specifically for a staggered setup with wider wheels in the rear. Changing this can negatively affect the car's handling balance, traction control, and ABS systems.
What happens if I use a wheel with the wrong offset?
An incorrect offset can cause the wheel to either sit too far inside the wheel well, potentially hitting suspension components, or too far outside, causing the tire to rub on the fender. Both scenarios are unsafe and can cause damage. It also increases stress on the wheel bearings, leading to premature failure.
Are all Alfa Romeo 4C wheels forged?
No. The standard wheels were cast aluminum. Lighter, stronger forged wheels were available as an option and on higher-trim or special edition models.
Does the car have a spare tire?
No, the Alfa Romeo 4C does not come with a spare tire from the factory. It is equipped with a tire service/inflator kit to save weight.
Technical Specifications
OEM Part Numbers: 68237424AA 68237425AA 68267942AA 68267945AA 68237519AA 68237520AA 68267943AA 68267946AA 68237414AA
Bolt Pattern: 5x98mm, Center Bore: 58.1mm, Lug Bolt: M12x1.25, Torque: 98 Nm (72 ft-lb). Staggered setups: 17x7 ET33 (Front) / 18x8 ET44 (Rear) OR 18x7 ET33 (Front) / 19x8.5 ET49 (Rear).
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Alfa Romeo 4C:
- 🛍️ Shop This Part
- Understanding 2015-2020 Alfa Romeo 4C Wheels
- Technical Specifications
- Factory Wheel Variants and Finishes
- Known Issues, Recalls, and TSBs
- Buying a Used 2015-2020 Alfa Romeo 4C Wheel
- Verifying Paint and Finish
- Cost of Replacing an Alfa Romeo 4C Wheel
- Frequently Asked Questions
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