Smart Roadster Bolt Pattern, Center Bore & Wheel Offset (2003)
Smart Roadster wheel fitment: 3x112 bolt pattern, 57.1mm center bore. OE wheel sizes and offsets for every Roadster variant we cover (2 guides), plus flush an
- 3x112bolt pattern (PCD)
- 57.1 mmcenter bore
- M12x1.5 Nutwheel bolt / nut
- 2 guidesmodel years 2003
Smart Roadster wheel specs by year and trim
| Year | Model / trim | Bolt pattern | Center bore | OE wheel |
|---|---|---|---|---|
| 2003 | Smart Roadster | 3x112 | 57.1 mm | — |
| 2003 | Smart Roadster Coupe | 3x112 | 57.1 mm | — |
Vehicles With the Same Hub as the Smart Roadster (3x112, 57.1 mm Bore)
In our database, 7 other Brabus entries use exactly the same 3x112 bolt pattern and 57.1 mm center bore. Factory wheels from these cars bolt on and center on the hub without rings; offset and width still have to be checked.
3x112 is used by 0.2% of the vehicle entries in our database (13 of 6,503); 100.0% of those also use a 57.1 mm center bore.
Offset and Backspacing: Factory Wheel vs Options
Backspacing ≈ width/2 + ET/25.4 + 0.5 in. "Inward" means closer to the suspension; "outward" means closer to the fender lip.
| Setup | Size | ET | Backspacing | Inward vs OE | Outward vs OE |
|---|---|---|---|---|---|
| Factory (OE) | 15x5J | ET24 | 3.94 in (100 mm) | — | — |
| Flush | 16x6.5J | ET20 | 4.54 in (115 mm) | +15 mm | +23 mm |
| Maximum | 17x7J | ET15 | 4.59 in (117 mm) | +16 mm | +34 mm |
Hub-Centric Rings for a 57.1 mm Center Bore
A wheel with a center bore larger than 57.1 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 60.1 mm | 60.1 → 57.1 mm |
| 63.4 mm | 63.4 → 57.1 mm |
| 64.1 mm | 64.1 → 57.1 mm |
| 65.1 mm | 65.1 → 57.1 mm |
| 73.1 mm | 73.1 → 57.1 mm |
ANKUSI forged wheels are bored to exactly 57.1 mm for this vehicle, so no ring is needed.
Sources and Last Update
Bolt pattern and center bore were checked against at least two independent fitment references before publication.
This record is part of the open ANKUSI Wheel Fitment Dataset (DOI 10.5281/zenodo.23241521, CC BY 4.0).
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.
FAQ
What is the bolt pattern on a Smart Roadster?
The Smart Roadster uses a 3x112 bolt pattern with a 57.1mm center bore across every Roadster variant in our database (2 guides, 2003).
What is the Smart Roadster center bore?
The hub-centric center bore is 57.1 mm. Aftermarket wheels should match this bore or use hub-centric rings so the hub, not the bolts, carries the load.
Do all Smart Roadster years share the same wheel fitment?
The bolt pattern and center bore are the same across the years we cover, but OE wheel width and offset differ by trim, so check the exact model line before choosing an aftermarket size.
Which forged wheels fit the Smart Roadster?
Any wheel drilled 3x112 with a 57.1mm hub bore in the offset range shown on the model guide. ANKUSI forges wheels to order for this exact specification, in 14–24 inch diameters, so no adapters or hub rings are needed.