Matte Black Steelie-Style Forged Wheels
Off-Road Beadlock · Matte Black
1948 Jeep Jeepster Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Jeep Jeepster wheels? This page gives the 1948 Jeep Jeepster bolt pattern (5x139.7), centre bore, factory rim size and the offset range for aftermarket and forged Jeep Jeepster rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 1948 Jeep Jeepster uses a 5x139.7 bolt pattern with a 108 mm centre bore. Factory wheels: 15x5J ET12. For aftermarket wheels, 15x6J ET0 sits flush.
Forged wheels for the 1948 Jeep Jeepster — drilled 5x139.7 with a 108 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
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Jeep Jeepster (1948): 5x139.7 bolt pattern, 108mm center bore, OE 15x5J ET12. Forged wheel fitment specs from ANKUSI.
Bolt Pattern5x139.7
Wheel Bolt/Nut1/2\"x20 Nut
Center Bore108mm
Wheel Load Rating700–850 kg/wheel (Performance / Sports Car segment reference)
Year1948
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) | 15x5J ET12 |
| Flush Fitment | 15x6J at ET0 offset |
Forged Wheel Designs for the Jeep Jeepster
Every design below is forged to order, so it can be machined to the Jeep Jeepster's 5x139.7 bolt pattern and 108 mm center bore, with the width and offset calculated for your setup.
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Black Rhino-Style Rhino Gloss White Full-Face Exposed Bolt Detail Forged Wheels
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Matte Black 8-Spoke Bolt-Ring Forged Wheels
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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
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 Jeep Jeepster ships from the factory on a 5x139.7 bolt pattern with a 108mm center bore and a 15x5J ET12 wheel. Our flush reference for the Jeep Jeepster is 15x6J ET0.; our maximum aggressive reference is 15x7J ET-12. — beyond that, expect clearance issues against the fender liner without further modification.
Jeep Jeepster OE Wheel Specs
The Jeep Jeepster ships from the factory on 5x139.7 bolt pattern wheels with a 108mm center bore. The stock wheel size is 15x5J ET12, 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 Jeep Jeepster (1948) we drill the 5x139.7 pattern and cut the centre bore to 108mm 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 | ET12 | 3.47 in (88 mm) | — | — |
| Flush | 15x6J | ET0 | 3.50 in (89 mm) | +1 mm | +25 mm |
| Maximum | 15x7J | ET-12 | 3.53 in (90 mm) | +1 mm | +49 mm |
Vehicles With the Same Hub as the Jeep Jeepster (5x139.7, 108 mm Bore)
In our database, 19 other Jeep entries use exactly the same 5x139.7 bolt pattern and 108 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.
5x139.7 is used by 0.9% of the vehicle pages in our English fitment guide (56 of 6,503); 35.7% of those also use a 108 mm center bore.
Hub-Centric Rings for a 108 mm Center Bore
A wheel with a center bore larger than 108 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 108.1 mm | 108.1 → 108 mm |
| 110.1 mm | 110.1 → 108 mm |
| 130.1 mm | 130.1 → 108 mm |
ANKUSI forged wheels are bored to exactly 108 mm for this vehicle, so no ring is needed.
Frequently Asked Questions
What bolt pattern (PCD) does the Jeep Jeepster use?
The 1948 Jeep Jeepster uses a 5x139.7 bolt pattern.
How many lug bolts does the Jeep Jeepster use?
The Jeep Jeepster uses a 5-lug bolt pattern (5x139.7), so you need a 5-lug forged wheel to bolt straight on.
What is the center bore size on the Jeep Jeepster?
The Jeep Jeepster's center bore is 108mm. 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 Jeep Jeepster?
Factory wheels on the Jeep Jeepster are 15x5J ET12.
What does a flush wheel fitment look like on the Jeep Jeepster?
For a flush look with minimal to no rubbing, we recommend 15x6J at ET0 offset as a starting point on a stock or mildly lowered Jeep Jeepster.
Do I need wheel spacers for my Jeep Jeepster?
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 Jeep Jeepster?
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 3.5" 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 Jeep Jeepster?
The Jeep Jeepster 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: 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.