BBS-Style Gold Mesh Polished Lip 2-Piece Forged Wheels
2-Piece · Gold
1974 Mazda 929 Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Mazda 929 wheels? This page gives the 1974 Mazda 929 bolt pattern (4x120), centre bore, factory rim size and the offset range for aftermarket and forged Mazda 929 rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 1974 Mazda 929 uses a 4x120 bolt pattern with a 60.1 mm centre bore and M12x1.5 lug nuts. Factory wheels: 13x5J ET30. For aftermarket wheels, 15x7J ET15 sits flush.
Forged wheels for the 1974 Mazda 929 — drilled 4x120 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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Mazda 929 (1974): 4x120 bolt pattern, 60.1mm center bore, OE 13x5J ET30. Forged wheel fitment specs from ANKUSI.
Bolt Pattern4x120
Wheel Bolt/NutM12x1.5 Nut
Center Bore60.1mm
Wheel Load Rating650–750 kg/wheel (Standard Passenger Car segment reference)
Year1974
CategoryCoupe
✓ 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) | 13x5J ET30 |
| Flush Fitment | 15x7J at ET15 offset |
Forged Wheel Designs for the Mazda 929
Every design below is forged to order, so it can be machined to the Mazda 929's 4x120 bolt pattern and 60.1 mm center bore, with the width and offset calculated for your setup.
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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
Coupes and performance platforms are where rotational mass shows up fastest — in acceleration, in braking, and in how quickly the chassis changes direction. Forging lets us build to the same strength spec as the factory wheel at a meaningfully lower rotational weight, which is where the performance gain actually comes from, not just the visual one.
The Mazda 929 ships from the factory on a 4x120 bolt pattern with a 60.1mm center bore and a 13x5J ET30 wheel. Our flush reference for the Mazda 929 is 15x7J ET15.; our maximum aggressive reference is 16x8J ET10. — beyond that, expect clearance issues against the fender liner without further modification.
Mazda 929 OE Wheel Specs
The Mazda 929 ships from the factory on 4x120 bolt pattern wheels with a 60.1mm center bore. The stock wheel size is 13x5J ET30, 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 Mazda 929 (1974) we drill the 4x120 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) | 13x5J | ET30 | 4.18 in (106 mm) | — | — |
| Flush | 15x7J | ET15 | 4.59 in (117 mm) | +10 mm | +40 mm |
| Maximum | 16x8J | ET10 | 4.89 in (124 mm) | +18 mm | +58 mm |
Vehicles With the Same Hub as the Mazda 929 (4x120, 60.1 mm Bore)
No other make in our database pairs 4x120 with a 60.1 mm center bore, so wheels taken from other brands need a hub-centric ring or a custom bore.
4x120 is used by <0.1% of the vehicle pages in our English fitment guide (1 of 6,503); 100.0% 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 Mazda 929 use?
The 1974 Mazda 929 uses a 4x120 bolt pattern.
How many lug bolts does the Mazda 929 use?
The Mazda 929 uses a 4-lug bolt pattern (4x120), so you need a 4-lug forged wheel to bolt straight on.
What is the center bore size on the Mazda 929?
The Mazda 929'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 size are the factory (stock) wheels on the Mazda 929?
Factory wheels on the Mazda 929 are 13x5J ET30.
What does a flush wheel fitment look like on the Mazda 929?
For a flush look with minimal to no rubbing, we recommend 15x7J at ET15 offset as a starting point on a stock or mildly lowered Mazda 929.
Do I need wheel spacers for my Mazda 929?
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 Mazda 929?
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 4.59" 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 Mazda 929?
The Mazda 929 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.
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: 13x5 wheels · 13 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.