2020 Smart EQ forfour Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Smart EQ forfour wheels? This page gives the 2020 Smart EQ forfour bolt pattern (4x100), centre bore, factory rim size and the offset range for aftermarket and forged Smart EQ forfour rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 2020 Smart EQ forfour uses a 4x100 bolt pattern with a 60.1 mm centre bore and M12x1.5 lug nuts. For aftermarket wheels, 16x6J ET30 front / 16x7J ET32 rear sits flush.
Forged wheels for the 2020 Smart EQ forfour — drilled 4x100 with a 60.1 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
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Smart EQ forfour (2020): 4x100 bolt pattern, 60.1mm center bore, OE F 15x5J ET32 / R 15x5.5J ET38. Forged wheel fitment specs from ANKUSI.
Bolt Pattern4x100
Wheel Bolt/NutM12x1.5 Nut
Center Bore60.1mm
Wheel Load Rating748–863 kg/wheel (Standard Passenger Car segment reference)
Year2020
CategoryEV Subcompact
Data check: the bolt pattern and center bore on this page have not yet been confirmed by a second independent source. Measure your hub or ask us before ordering. How we verify
Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Flush Fitment | F 16x6J ET30 / R 16x7J ET32 |
Forged Wheel Designs for the Smart EQ forfour
Every design below is forged to order, so it can be machined to the Smart EQ forfour's 4x100 bolt pattern and 60.1 mm center bore, with the width and offset calculated for your setup.
BBS LM-Style Gunmetal Mesh Polished Deep Lip Forged Wheels
Deep Dish · Gunmetal
Rotiform-Style Gloss White 6-Spoke Forged Wheels
Monoblock · Gloss White
BBS-Style Gold Mesh Polished Lip Forged Wheels
Monoblock · Gold
BBS-Style Gold Mesh Polished Lip 2-Piece Forged Wheels
2-Piece · Gold
Bronze Gold Cross-Spoke Forged Wheels
Monoblock · Bronze Gold
OZ Racing-Style Gloss White 15-Spoke Forged Wheels
Monoblock · Gloss White
Rays-Style Gunmetal Mesh Polished Deep Lip Forged Wheels
Deep Dish · Gunmetal
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
Electric vehicles carry more curb weight than a comparable combustion model, almost entirely from the battery pack low in the chassis, so unsprung mass at the wheel matters more here, not less — the extra weight the battery adds elsewhere leaves less margin for a heavy wheel to fight the suspension. Forging keeps the Smart EQ forfour's wheel light at the same strength rating, which also protects the efficiency-driven range figures EV buyers care about.
The Smart EQ forfour ships from the factory on a 4x100 bolt pattern with a 60.1mm center bore and a F 15x5J ET32 / R 15x5.5J ET38 wheel. Our flush reference for the Smart EQ forfour is F 16x6J ET30 / R 16x7J ET32.; our maximum aggressive reference is F 17x7J ET28 / R 17x7.5J ET30. — beyond that, expect clearance issues against the fender liner without further modification.
Smart EQ forfour OE Wheel Specs
The Smart EQ forfour ships from the factory on 4x100 bolt pattern wheels with a 60.1mm center bore. The stock wheel size is F 15x5J ET32 / R 15x5.5J ET38, offering a balanced ride that suits most owners without any rubbing or clearance concerns.
Why the factory spec works for most owners:
- Balances ride comfort with steering response and highway efficiency.
- Wide tire and wheel availability at the factory diameter keeps replacement costs low.
- Lower unsprung weight than larger aftermarket wheels helps ride quality and acceleration.
- Guaranteed clearance against brake calipers and suspension components.
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Smart EQ forfour (2020) we drill the 4x100 pattern and cut the centre bore to 60.1mm 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 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 | ET32 | 4.26 in (108 mm) | — | — |
| Flush | 16x6J | ET30 | 4.68 in (119 mm) | +11 mm | +15 mm |
| Maximum | 17x7J | ET28 | 5.10 in (130 mm) | +21 mm | +29 mm |
Vehicles With the Same Hub as the Smart EQ forfour (4x100, 60.1 mm Bore)
In our database, 149 other vehicle entries from 10 makes use exactly the same 4x100 bolt pattern and 60.1 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.
4x100 is used by 6.9% of the vehicle pages in our English fitment guide (451 of 6,503); 33.3% of those also use a 60.1 mm center bore.
Hub-Centric Rings for a 60.1 mm Center Bore
A wheel with a center bore larger than 60.1 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 63.4 mm | 63.4 → 60.1 mm |
| 64.1 mm | 64.1 → 60.1 mm |
| 65.1 mm | 65.1 → 60.1 mm |
| 66.1 mm | 66.1 → 60.1 mm |
| 73.1 mm | 73.1 → 60.1 mm |
ANKUSI forged wheels are bored to exactly 60.1 mm for this vehicle, so no ring is needed.
Frequently Asked Questions
What bolt pattern (PCD) does the Smart EQ forfour use?
The 2020 Smart EQ forfour uses a 4x100 bolt pattern.
How many lug bolts does the Smart EQ forfour use?
The Smart EQ forfour uses a 4-lug bolt pattern (4x100), so you need a 4-lug forged wheel to bolt straight on.
What is the center bore size on the Smart EQ forfour?
The Smart EQ forfour's center bore is 60.1mm. If an aftermarket wheel has a larger center bore than this, hub-centric rings are recommended so the wheel centers on the hub itself rather than relying on the lug bolts alone.
What does a flush wheel fitment look like on the Smart EQ forfour?
For a flush look with minimal to no rubbing, we recommend F 16x6J ET30 / R 16x7J ET32 as a starting point on a stock or mildly lowered Smart EQ forfour.
Do I need wheel spacers for my Smart EQ forfour?
No. ANKUSI forges each wheel to your exact target offset, including the flush or max specs above, so you get the correct fitment without stacking spacers. Spacers are typically only used to push out an existing OE-offset wheel without replacing it, which isn't necessary when you're ordering a custom-offset forged wheel.
How do I calculate wheel backspacing for my Smart EQ forfour?
Backspacing (in inches) = wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance). For example, the flush spec above works out to roughly 4.68" backspacing up front and 5.26" in the rear.
What's the difference between wheel offset and backspacing?
Offset is the distance in millimeters from the wheel's true centerline to its mounting face (positive offset pulls the wheel in, negative pushes it out). Backspacing is the distance in inches from the mounting face to the back edge of the wheel barrel. They describe the same fitment from two different reference points, which is why ANKUSI lists both above — some shops and tuning guides quote offset, others quote backspacing.
Can I run staggered wheels (different sizes front and rear) on my Smart EQ forfour?
Yes — the Smart EQ forfour's factory and our recommended flush/max fitments already use staggered sizing (different width front and rear), and ANKUSI can forge matching staggered sets to your target offsets.
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: 15x5 wheels · 15 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.
Bolt pattern and center bore on this page come from published fitment references and are still awaiting a second independent check. Last reviewed 2026-09-18. Spotted an error? Email info@ankusi.com and we will verify and correct it.