BBS LM-Style Gunmetal Mesh Polished Deep Lip Forged Wheels
Deep Dish · Gunmetal
1973 Mazda RX-3 Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Mazda RX-3 wheels? This page gives the 1973 Mazda RX-3 bolt pattern (4x114.3), centre bore, factory rim size and the offset range for aftermarket and forged Mazda RX-3 rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 1973 Mazda RX-3 uses a 4x114.3 bolt pattern with a 59.6 mm centre bore and M12x1.5 lug nuts. Factory wheels: 13x5J ET30. For aftermarket wheels, 15x7J ET15 sits flush.
Forged wheels for the 1973 Mazda RX-3 — drilled 4x114.3 with a 59.6 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
Get a quote for this car
Mazda RX-3 (1973): 4x114.3 bolt pattern, 59.6mm center bore, OE 13x5J ET30. Forged wheel fitment specs from ANKUSI.
Bolt Pattern4x114.3
Wheel Bolt/NutM12x1.5 Nut
Center Bore59.6mm
Wheel Load Rating650–750 kg/wheel (Standard Passenger Car segment reference)
Year1973
CategoryCoupe
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) | 13x5J ET30 |
| Flush Fitment | 15x7J at ET15 offset |
Forged Wheel Designs for the Mazda RX-3
Every design below is forged to order, so it can be machined to the Mazda RX-3's 4x114.3 bolt pattern and 59.6 mm center bore, with the width and offset calculated for your setup.
Rotiform-Style Gloss White 6-Spoke Forged Wheels
Monoblock · Gloss White
BBS-Style Gold Mesh Polished Lip 2-Piece Forged Wheels
2-Piece · Gold
Weld Racing-Style 5-Spoke Mirror Milled Beadlock Forged Drag Racing Wheels
Drag Racing · Custom Finish
OZ Racing-Style Gloss White 15-Spoke Forged Wheels
Monoblock · Gloss White
APEX-Style Matte Bronze 8 Y-Spoke Mesh Forged Wheels
Monoblock · Matte Bronze
BBS-Style Gold Mesh Polished Lip Forged Wheels
Monoblock · Gold
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 RX-3 ships from the factory on a 4x114.3 bolt pattern with a 59.6mm center bore and a 13x5J ET30 wheel. Our flush reference for the Mazda RX-3 is 15x7J ET15.; our maximum aggressive reference is 15x8J ET10. — beyond that, expect clearance issues against the fender liner without further modification.
Mazda RX-3 OE Wheel Specs
The Mazda RX-3 ships from the factory on 4x114.3 bolt pattern wheels with a 59.6mm 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 RX-3 (1973) we drill the 4x114.3 pattern and cut the centre bore to 59.6mm 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) | 13x5J | ET30 | 4.18 in (106 mm) | — | — |
| Flush | 15x7J | ET15 | 4.59 in (117 mm) | +10 mm | +40 mm |
| Maximum | 15x8J | ET10 | 4.89 in (124 mm) | +18 mm | +58 mm |
Vehicles With the Same Hub as the Mazda RX-3 (4x114.3, 59.6 mm Bore)
No other make in our database pairs 4x114.3 with a 59.6 mm center bore, so wheels taken from other brands need a hub-centric ring or a custom bore.
4x114.3 is used by 0.6% of the vehicle pages in our English fitment guide (41 of 6,503); 2.4% of those also use a 59.6 mm center bore.
Hub-Centric Rings for a 59.6 mm Center Bore
A wheel with a center bore larger than 59.6 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 60.1 mm | 60.1 → 59.6 mm |
| 63.4 mm | 63.4 → 59.6 mm |
| 64.1 mm | 64.1 → 59.6 mm |
| 65.1 mm | 65.1 → 59.6 mm |
| 73.1 mm | 73.1 → 59.6 mm |
ANKUSI forged wheels are bored to exactly 59.6 mm for this vehicle, so no ring is needed.
Frequently Asked Questions
What bolt pattern (PCD) does the Mazda RX-3 use?
The 1973 Mazda RX-3 uses a 4x114.3 bolt pattern.
How many lug bolts does the Mazda RX-3 use?
The Mazda RX-3 uses a 4-lug bolt pattern (4x114.3), so you need a 4-lug forged wheel to bolt straight on.
What is the center bore size on the Mazda RX-3?
The Mazda RX-3's center bore is 59.6mm. 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 Mazda RX-3?
Factory wheels on the Mazda RX-3 are 13x5J ET30.
What does a flush wheel fitment look like on the Mazda RX-3?
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 RX-3.
Do I need wheel spacers for my Mazda RX-3?
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 RX-3?
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 RX-3?
The Mazda RX-3 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: 13x5 wheels · 13 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.