1966 Saab Sonett II Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Saab Sonett II wheels? This page gives the 1966 Saab Sonett II bolt pattern (5x170), centre bore, factory rim size and the offset range for aftermarket and forged Saab Sonett II rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 1966 Saab Sonett II uses a 5x170 bolt pattern with a 71.6 mm centre bore and M12x1.5 lug bolts. Factory wheels: 15x4J ET40. For aftermarket wheels, 15x5J ET30 sits flush.
Forged wheels for the 1966 Saab Sonett II — drilled 5x170 with a 71.6 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
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Saab Sonett II (1966): 5x170 bolt pattern, 71.6mm center bore, OE 15x4J ET40. Forged wheel fitment specs from ANKUSI.
Bolt Pattern5x170
Wheel Bolt/NutM12x1.5 Bolt
Center Bore71.6mm
Wheel Load Rating700–850 kg/wheel (Performance / Sports Car segment reference)
Year1966
Category5-Lug Performance / Tuner
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 |
|---|---|
| Factory (OE) | 15x4J ET40 |
| Flush Fitment | 15x5J at ET30 offset |
Forged Wheel Designs for the Saab Sonett II
Every design below is forged to order, so it can be machined to the Saab Sonett II's 5x170 bolt pattern and 71.6 mm center bore, with the width and offset calculated for your setup.
Saab OEM-Style Matte Silver 5 Y-Spoke Forged Wheels
Replica · Matte Silver
Gold / Gloss Black 2-Piece Carbon Fibre Forged Wheels
Carbon Fiber · Gold / Gloss Black
APEX-Style Chrome 10-Spoke Forged Wheels
Monoblock · Chrome
Saab OEM-Style Transparent Gray 6-Spoke Side-Milled Forged Wheels
Monoblock · Transparent Gray
Saab OEM-Style Hyper Silver Turbine 10-Spoke Forged Wheels
Monoblock · Hyper Silver
Gloss Black 2-Piece 10 Y-Spoke Forged Wheels
2-Piece · Gloss Black
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
Most of the engineering value in a forged wheel over a cast one shows up in rotational mass, not outright strength — both can meet the same load rating, but the forged piece gets there lighter. On a sedan platform tuned for everyday balance, that weight saving is felt directly in steering response and ride quality.
The Saab Sonett II ships from the factory on a 5x170 bolt pattern with a 71.6mm center bore and a 15x4J ET40 wheel. Our flush reference for the Saab Sonett II is 15x5J ET30.; our maximum aggressive reference is 15x5.5J ET25. — beyond that, expect clearance issues against the fender liner without further modification.
Saab Sonett II OE Wheel Specs
The Saab Sonett II ships from the factory on 5x170 bolt pattern wheels with a 71.6mm center bore. The stock wheel size is 15x4J ET40, 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 Saab Sonett II (1966) we drill the 5x170 pattern and cut the centre bore to 71.6mm 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) | 15x4J | ET40 | 4.07 in (103 mm) | — | — |
| Flush | 15x5J | ET30 | 4.18 in (106 mm) | +3 mm | +23 mm |
| Maximum | 15x5.5J | ET25 | 4.23 in (108 mm) | +4 mm | +34 mm |
Vehicles With the Same Hub as the Saab Sonett II (5x170, 71.6 mm Bore)
In our database, 3 other Saab entries use exactly the same 5x170 bolt pattern and 71.6 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.
5x170 is used by <0.1% of the vehicle pages in our English fitment guide (4 of 6,503); 100.0% of those also use a 71.6 mm center bore.
Hub-Centric Rings for a 71.6 mm Center Bore
A wheel with a center bore larger than 71.6 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 72.6 mm | 72.6 → 71.6 mm |
| 73.1 mm | 73.1 → 71.6 mm |
| 74.1 mm | 74.1 → 71.6 mm |
| 76.1 mm | 76.1 → 71.6 mm |
ANKUSI forged wheels are bored to exactly 71.6 mm for this vehicle, so no ring is needed.
Frequently Asked Questions
What bolt pattern (PCD) does the Saab Sonett II use?
The 1966 Saab Sonett II uses a 5x170 bolt pattern.
How many lug bolts does the Saab Sonett II use?
The Saab Sonett II uses a 5-lug bolt pattern (5x170), so you need a 5-lug forged wheel to bolt straight on.
What is the center bore size on the Saab Sonett II?
The Saab Sonett II's center bore is 71.6mm. 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 size are the factory (stock) wheels on the Saab Sonett II?
Factory wheels on the Saab Sonett II are 15x4J ET40.
What does a flush wheel fitment look like on the Saab Sonett II?
For a flush look with minimal to no rubbing, we recommend 15x5J at ET30 offset as a starting point on a stock or mildly lowered Saab Sonett II.
Do I need wheel spacers for my Saab Sonett II?
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 Saab Sonett II?
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 4.18" of backspacing.
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 Saab Sonett II?
The Saab Sonett II runs the same wheel size front and rear from the factory, so staggered fitment is not required. ANKUSI can still forge a staggered set (wider rear) on request if you want a more aggressive stance.
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: 15x4 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.