Black Rhino-Style Gloss Black 14-Spoke Forged Wheels
Deep Dish · Matte Black
1950 Jeep M-38 Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Jeep M-38 wheels? This page gives the 1950 Jeep M-38 bolt pattern (5x139.7), centre bore, factory rim size and the offset range for aftermarket and forged Jeep M-38 rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 1950 Jeep M-38 uses a 5x139.7 bolt pattern with a 108 mm centre bore. Factory wheels: 16x4.5J ET12. For aftermarket wheels, 16x6J ET0 sits flush.
Forged wheels for the 1950 Jeep M-38 — 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.
Get a quote for this car
Jeep M-38 (1950): 5x139.7 bolt pattern, 108mm center bore, OE 16x4.5J ET12. Forged wheel fitment specs from ANKUSI.
Bolt Pattern5x139.7
Wheel Bolt/Nut1/2\"x20 Nut
Center Bore108mm
Wheel Load Rating650–750 kg/wheel (Standard Passenger Car segment reference)
Year1950
Category5-Lug Standard Sedan
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) | 16x4.5J ET12 |
| Flush Fitment | 16x6J at ET0 offset |
Forged Wheel Designs for the Jeep M-38
Every design below is forged to order, so it can be machined to the Jeep M-38's 5x139.7 bolt pattern and 108 mm center bore, with the width and offset calculated for your setup.
Bradley-Style Gunmetal 5-Spoke Off-Road Forged Wheels
Off-Road · Gunmetal
Black / Machined Cross-Spoke Machined Face Forged Wheels
Off-Road · Black Machined
Gunmetal Round-Hole Deep Lip Forged Wheels
Deep Dish · Gunmetal
Polished 5-Spoke Deep Dish Forged Wheels
Off-Road · Polished
Gloss Black Full-Face Forged Wheels
Off-Road · Gloss Black
Matte Black Semi-Full-Face Riveted Forged Wheels
Deep Dish · Matte Black
Transparent Orange / Brushed Mesh Forged Wheels
Off-Road Beadlock · Transparent Orange / Brushed
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
A sedan's wheel spec is a balance point the factory tuned between ride comfort, steering feel, and everyday durability. Forging lets us hold that same structural margin while cutting rotational mass, which is where most of the real-world benefit — quicker steering response, marginally better ride — actually comes from.
The Jeep M-38 ships from the factory on a 5x139.7 bolt pattern with a 108mm center bore and a 16x4.5J ET12 wheel. Our flush reference for the Jeep M-38 is 16x6J ET0.; our maximum aggressive reference is 16x7J ET-12. — beyond that, expect clearance issues against the fender liner without further modification.
Jeep M-38 OE Wheel Specs
The Jeep M-38 ships from the factory on 5x139.7 bolt pattern wheels with a 108mm center bore. The stock wheel size is 16x4.5J 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 M-38 (1950) 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) | 16x4.5J | ET12 | 3.22 in (82 mm) | — | — |
| Flush | 16x6J | ET0 | 3.50 in (89 mm) | +7 mm | +31 mm |
| Maximum | 16x7J | ET-12 | 3.53 in (90 mm) | +8 mm | +56 mm |
Vehicles With the Same Hub as the Jeep M-38 (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 M-38 use?
The 1950 Jeep M-38 uses a 5x139.7 bolt pattern.
How many lug bolts does the Jeep M-38 use?
The Jeep M-38 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 M-38?
The Jeep M-38'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 M-38?
Factory wheels on the Jeep M-38 are 16x4.5J ET12.
What does a flush wheel fitment look like on the Jeep M-38?
For a flush look with minimal to no rubbing, we recommend 16x6J at ET0 offset as a starting point on a stock or mildly lowered Jeep M-38.
Do I need wheel spacers for my Jeep M-38?
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 M-38?
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 M-38?
The Jeep M-38 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: 16 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.