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2004 Dodge Ram Heavy Duty Cummins 600 Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Dodge Ram Heavy Duty Cummins 600 wheels? This page gives the 2004 Dodge Ram Heavy Duty Cummins 600 bolt pattern (8x165.1), centre bore, factory rim size and the offset range for aftermarket and forged Dodge Ram Heavy Duty Cummins 600 rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 2004 Dodge Ram Heavy Duty Cummins 600 uses a 8x165.1 bolt pattern with a 121.3 mm centre bore and M12x1.5 lug nuts. Factory wheels: 17x8.0J ET25, front and rear. For aftermarket wheels, 17x9.0J ET12 sits flush and 18x9.0J ET0 is the most aggressive fit.
Forged wheels for the 2004 Dodge Ram Heavy Duty Cummins 600 — drilled 8x165.1 with a 121.3 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
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Dodge Ram Heavy Duty Cummins 600 (2004): 8x165.1 bolt pattern, 121.3mm center bore. Factory wheels: 17x8.0J at ET25 offset, front and rear. Reference fitment ranges.
Bolt Pattern8x165.1
Wheel Bolt/NutM12x1.5 Nut
Center Bore121.3mm
Wheel Load Rating1000–1400 kg/wheel (Pickup / Light Truck segment reference)
Year2004
CategoryPickup
✓ 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) | 17x8.0J F/R |
| Flush Fitment | 17x9.0J at ET12 offset |
| Maximum Aggressive | 18x9.0J at ET0 offset |
Forged Wheel Designs for the Dodge Ram Heavy Duty Cummins 600
Every design below is forged to order, so it can be machined to the Dodge Ram Heavy Duty Cummins 600's 8x165.1 bolt pattern and 121.3 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
Payload and towing figures on a truck are engineered around a specific unsprung mass budget at each corner. Forging lets ANKUSI hit the factory strength rating for the Dodge Ram Heavy Duty Cummins 600 at a lower rotational weight than an equivalent cast wheel, which is the more meaningful upgrade on a work-capable platform than diameter alone.
The Dodge Ram Heavy Duty Cummins 600 runs a 8x165.1 bolt pattern, 121.3mm center bore, and a 17x8.0J, front and rear, wheel from the factory. Our Flush Fitment reference is 17x9.0J ET12, which tucks the tire under the fender lip on a stock-height Dodge Ram Heavy Duty Cummins 600. Our Maximum Aggressive reference is 18x9.0J ET0 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Dodge Ram Heavy Duty Cummins 600 OE Wheel Specs
The 2004 Dodge Ram Heavy Duty Cummins 600 (Pickup) uses a 8x165.1 bolt pattern with a 121.3mm center bore. Factory wheels are 17x8.0J F/R.
Why the factory spec works for most owners:
- Supports higher payload and towing capacity
- Preserves ground clearance for towing, hauling and light off-road use
- Matches tire sizing commonly available for this class of vehicle
- Maintains clearance for the factory suspension and brake package
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Dodge Ram Heavy Duty Cummins 600 (2004) we drill the 8x165.1 pattern and cut the centre bore to 121.3mm 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.
A Note on Clearance
Final clearance depends on the exact tire model, suspension height, brake package, alignment and vehicle tolerances. A physical test fit is recommended before production.
Want to check a different width or offset before you order? Use our Offset & Backspacing Calculator to solve the numbers yourself, or looking for your exact Dodge spec, or want a wheel built to a custom offset for your Dodge Ram Heavy Duty Cummins 600? Contact ANKUSI with your bolt pattern and offset target and we will confirm the correct forged wheel spec for your build.
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) | 17x8J | ET25 | 5.48 in (139 mm) | — | — |
| Flush | 17x9J | ET12 | 5.47 in (139 mm) | 0 mm | +26 mm |
| Maximum | 18x9J | ET0 | 5.00 in (127 mm) | −12 mm | +38 mm |
Vehicles With the Same Hub as the Dodge Ram Heavy Duty Cummins 600 (8x165.1, 121.3 mm Bore)
In our database, 7 other vehicle entries from 2 makes use exactly the same 8x165.1 bolt pattern and 121.3 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.
8x165.1 is used by 0.4% of the vehicle pages in our English fitment guide (29 of 6,503); 27.6% of those also use a 121.3 mm center bore.
Hub-Centric Rings for a 121.3 mm Center Bore
A wheel with a center bore larger than 121.3 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 130.1 mm | 130.1 → 121.3 mm |
ANKUSI forged wheels are bored to exactly 121.3 mm for this vehicle, so no ring is needed.
Frequently Asked Questions
What bolt pattern (PCD) does the Dodge Ram Heavy Duty Cummins 600 use?
The 2004 Dodge Ram Heavy Duty Cummins 600 uses a 8x165.1 bolt pattern.
How many lug bolts does the Dodge Ram Heavy Duty Cummins 600 use?
The Dodge Ram Heavy Duty Cummins 600 uses a 8-lug bolt pattern (8x165.1), so you need a 8-lug forged wheel to bolt straight on.
What is the center bore size on the Dodge Ram Heavy Duty Cummins 600?
The Dodge Ram Heavy Duty Cummins 600's center bore is 121.3mm. 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 Dodge Ram Heavy Duty Cummins 600?
Factory wheels on the Dodge Ram Heavy Duty Cummins 600 are 17x8.0J F/R.
What is the biggest wheel size I can fit on my Dodge Ram Heavy Duty Cummins 600 without rubbing?
The most aggressive fitment we recommend without fender work is 18x9.0J at ET0 offset. Going beyond this typically causes rubbing under compression unless you roll the fenders or add camber correction.
What does a flush wheel fitment look like on the Dodge Ram Heavy Duty Cummins 600?
For a flush look with minimal to no rubbing, we recommend 17x9.0J at ET12 offset as a starting point on a stock or mildly lowered Dodge Ram Heavy Duty Cummins 600.
Do I need wheel spacers for my Dodge Ram Heavy Duty Cummins 600?
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 Dodge Ram Heavy Duty Cummins 600?
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 5.47" 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 Dodge Ram Heavy Duty Cummins 600?
The Dodge Ram Heavy Duty Cummins 600 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: 17x8 wheels · 17 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.