2003 Brabus Smart Roadster Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Brabus Smart Roadster wheels? This page gives the 2003 Brabus Smart Roadster bolt pattern (3x112), centre bore, factory rim size and the offset range for aftermarket and forged Brabus Smart Roadster rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 2003 Brabus Smart Roadster uses a 3x112 bolt pattern with a 57.1 mm centre bore and M14x1.5 lug bolts. Factory wheels: F: 17x7.0J R: 17x8.5J. For aftermarket wheels, 18x7.5J ET15 front / 18x9.0J ET15 rear sits flush and 18x8.0J ET10 front / 18x9.5J ET10 rear is the most aggressive fit.
Forged wheels for the 2003 Brabus Smart Roadster — drilled 3x112 with a 57.1 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
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Brabus Smart Roadster (2003): 3x112 bolt pattern, 57.1mm center bore. Factory wheels: F: 17x7.0J R: 17x8.5J. Reference fitment ranges.
✓ Data check: the bolt pattern and center bore on this page match an independent fitment reference. Last reviewed September 18, 2026. How we verify
Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Factory (OE) | F: 17x7.0J R: 17x8.5J |
| Flush Fitment | F 18x7.5J ET15 / R 18x9.0J ET15 |
| Maximum Aggressive | F 18x8.0J ET10 / R 18x9.5J ET10 |
How to Read Wheel Offset & Measurements
Use these two references before ordering: the left diagram shows where each spec (PCD, center bore, offset, width and diameter) is measured on the wheel; the right diagram shows how positive, zero and negative offset shift the wheel face relative to the hub centerline.
ANKUSI Engineering Expert Advice
With less structural stiffness from the missing roof, a convertible's suspension tuning leans more heavily on unsprung mass control. Forged construction keeps wheel weight down at the same strength rating, which is one less variable working against the Brabus Smart Roadster's chassis.
The Brabus Smart Roadster runs a 3x112 bolt pattern, 57.1mm center bore, and a F: 17x7.0J wheel from the factory. Our Flush Fitment reference is F 18x7.5J ET15 / R 18x9.0J ET15, which tucks the tire under the fender lip on a stock-height Brabus Smart Roadster. Our Maximum Aggressive reference is F 18x8.0J ET10 / R 18x9.5J ET10 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Brabus Smart Roadster OE Wheel Specs
The 2003 Brabus Smart Roadster (Roadster) uses a 3x112 bolt pattern with a 57.1mm center bore. Factory wheels are F: 17x7.0J R: 17x8.5J.
Why the factory spec works for most owners:
- Balances ride comfort with everyday fuel efficiency
- A widely used size in this segment, so tire and wheel availability stays strong
- Keeps unsprung weight low for stable, predictable handling
- Maintains clearance for the factory brake calipers and suspension components
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Brabus Smart Roadster (2003) we drill the 3x112 pattern and cut the centre bore to 57.1mm on our own CNC line, so the wheel hub-centres on the car with no spacer rings, in whatever diameter, width and offset you specify.
Converting these ET figures to backspacing? Use the wheel offset and backspacing calculator.
The figures on this page are part of our open wheel fitment dataset — 10,093 vehicles, free to download, CC BY 4.0.
Offset & Backspacing Reference
Backspacing is calculated as wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance):
- OE: F 17x7.0J ET20 → ~4.79″ F backspacing, R 17x8.5J ET20 → ~5.54″ R backspacing
- Flush: F 18x7.5J ET15 → ~4.84″ F backspacing, R 18x9.0J ET15 → ~5.59″ R backspacing
- Max: F 18x8.0J ET10 → ~4.89″ F backspacing, R 18x9.5J ET10 → ~5.64″ R backspacing
Want to check a different width or offset before you order? Use our Offset & Backspacing Calculator to solve the numbers yourself, or looking for your exact Brabus spec, or want a wheel built to a custom offset for your Brabus Smart Roadster? Contact ANKUSI with your bolt pattern and offset target and we will confirm the correct forged wheel spec for your build.
Vehicles With the Same Hub as the Brabus Smart Roadster (3x112, 57.1 mm Bore)
In our database, 12 other vehicle entries from 2 makes 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 pages in our English fitment guide (13 of 6,503); 100.0% of those also use a 57.1 mm center bore.
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.
Frequently Asked Questions
What bolt pattern (PCD) does the Brabus Smart Roadster use?
How many lug bolts does the Brabus Smart Roadster use?
What is the center bore size on the Brabus Smart Roadster?
What size are the factory (stock) wheels on the Brabus Smart Roadster?
What is the biggest wheel size I can fit on my Brabus Smart Roadster without rubbing?
What does a flush wheel fitment look like on the Brabus Smart Roadster?
Do I need wheel spacers for my Brabus Smart Roadster?
How do I calculate wheel backspacing for my Brabus Smart Roadster?
What's the difference between wheel offset and backspacing?
Can I run staggered wheels (different sizes front and rear) on my Brabus Smart Roadster?
Sources and Last Update
Data checked against: avtoreference.com, tirewheelguide.com.
This record is part of the open ANKUSI Wheel Fitment Dataset (DOI 10.5281/zenodo.23241521, CC BY 4.0).
Other cars on the same factory size: 17x7 wheels · 17 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.