OEM wheel and tire fitment specs for the 2008 Dodge Ram 3500, including bolt pattern (PCD), center bore diameter, thread size, rim diameter, rim width, wheel offset, and backspacing.
Recorded OEM specifications for the 2008 Dodge Ram 3500, donor years with overlapping ranges, and a calculator to compare a selected wheel. Range overlap is not a guaranteed fit.
Multiple OEM configurations exist for this vehicle. Fitment can vary by trim, brakes, and factory wheel package – confirm your exact setup before buying.
Center-bore records disagree: year-level hub 130.8 mm vs trim range 121.3–121.3 mm. Interchange below does not treat this as an unqualified match.
Thread-only product links are shopping examples, not verified fits. Seat style is not confirmed here. As an Amazon Associate we earn from qualifying purchases.
Donor vehicles with overlapping OEM specs
These are vehicle-year records whose recorded OEM ranges overlap this 2008 Dodge Ram 3500. Overlap is not a guarantee that a specific wheel will install. Selected-wheel comparison is in the calculator below.
Evaluated 24 donor years. Listed 24 eligible overlaps (not all evaluated years are compatible). Showing all listed.
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Center-bore records disagree (target year-level hub 130.8 mm vs trim range 121.3–121.3 mm; donor year-level hub 130.8 mm vs trim range 121.3–121.3 mm). Unqualified overlap is not claimed until the conflict is resolved. Approximate position vs the mid OEM package: outer change 7.6 mm, inner change -58.4 mm. This uses aggregated width/offset ranges, not a specific wheel.
Insufficient dataCheck lug hardware: donor year M14x1.5 vs 2008 Dodge Ram 3500 9/16"-18UNF
Bolt pattern8x165.1 · Same recorded PCD
Center bore130.8 mm donor vs hub 121.3 mm
Wheel geometryNot fully recorded
Recorded vehicle-side thread for the 2008 Dodge Ram 3500 is 9/16"-18UNF. This donor year is recorded as M14x1.5. That is the vehicle stud/nut thread, not an intrinsic thread stamped on the wheel. Hardware must match this vehicle’s studs and the selected wheel’s seat and engagement. Existing hardware may be reusable if it already matches. Seat style is not in this dataset, so products are not a verified fit.
Dataset suggestionHub-centric rings ≈ 130.8 → 121.3 mm – not a verified installation requirement.
Wheel width/offset data is incomplete. Hub ring 130.8 → 121.3 mm may apply if mounting dimensions are otherwise compatible.
Donor width/offset sits outside the known OEM envelope for this vehicle. Precomputed data suggested a spacer; geometry was re-checked against OEM envelope.
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Center-bore records disagree (target year-level hub 130.8 mm vs trim range 121.3–121.3 mm; donor year-level hub 120.9 mm vs trim range 121.3–121.3 mm). Unqualified overlap is not claimed until the conflict is resolved. Approximate position vs the mid OEM package: outer change 15.95 mm, inner change -54.05 mm. This uses aggregated width/offset ranges, not a specific wheel.
Dodge Ram 3500 Years With Compatible Wheels
Only years with evidence-based interchange relationships are listed. Adjacent years are not assumed compatible.
Compare a donor vehicle or custom wheel against this 2008 Dodge Ram 3500. Use Compare in calculator on a donor row above to fill the donor side of this same calculator.
Compare
Compare wheel compatibility between two vehicles
Wheels from (donor vehicle)
Selected Car:
Custom wheel size (optional)
Tip: change values here to simulate custom wheels and immediately see the impact in the comparison below.
Custom tire size (optional)
Installed on (your vehicle)
Selected Car:
2008 Dodge Ram 3500
Compare Rims
Specification
Wheels from
Installed on
Result (Click it)
Bolt Pattern
The total number of bolt holes and the diameter of the circle they form.
-
8x165.1
Center Bore
The hole in the center of the wheel that fits over the vehicle’s hub.
-
121.3 mm
Thread Size
The size and spacing of the threads on the bolts or nuts that hold the wheel in place.
-
9/16" - 18 UNF
Rim Diameter
The wheel diameter in inches that determines which tire sizes will fit.
-
17"
Rim Width
The distance between the inner edges of the wheel is measured in inches.
-
7.5"
Wheel Offset
How far the wheel sits inward or outward relative to the hub mounting surface.
-
45 mm
Backspacing
Shows how much space the wheel takes up toward the inside of the vehicle.
-
-
Wheel Fasteners
The type of hardware used to secure the wheel to the vehicle.
-
-
Compare Tires
Specification
Wheels from
Installed on
Result (Click it)
Section Width
The width of the tire from sidewall to sidewall, measured in millimeters.
-
-
Aspect Ratio
The height of the tire’s sidewall expressed as a percentage of its width.
-
-
Diameter
The wheel diameter for which the tire is designed to fit.
-
-
Tire Pressure
The recommended air pressure for safe and efficient driving.
-
-
Overall Diameter
The total height of the tire and wheel combined affects clearance and speedometer accuracy.
-
-
Wheel Fitment Parts for the 2008 Dodge Ram 3500
Example products matched to recorded thread, hub, or spacer dimensions. They are not verified fits. Confirm seat style, thickness, and clearance before ordering.
The values below are taken from available sources for the 2008 Ram 3500. Trims and packages can vary, and heavy duty trucks may have different wheel and tire options from the factory. If any dimension on your truck differs from what you see here, verify it against your door-jamb tire placard, the owner’s manual, or by measuring directly, then confirm with the on-page calculator.
Bolt pattern
8x165.1 mm (8x6.5)
Center bore
121.3 mm
Thread size
M14 x 1.5
OEM wheel diameter
18 in
OEM wheel width
7.5 in
OEM wheel offset (ET)
45 mm
OEM backspacing
5.52 in
OEM tire size example
245/70R17
Note: The wheel and tire entries above reflect more than one OEM package. It is normal for a 2008 Ram 3500 to have different factory combinations across trims. Always match your truck’s placard and confirm clearances with the calculator before buying.
How To Use The Wheel Interchange Calculator
The calculator lets you compare two setups side by side and test custom sizes. It updates tire diameter automatically when you change rim diameter, so you can quickly see overall height changes and clearance impacts.
Step 1. In “Wheels from (donor vehicle),” enter the specs of the wheels you want to try. If you do not know all the specs, enter what you have and use typical sizes as placeholders until you can verify.
Step 2. In “Installed on (your vehicle),” select 2008 Dodge Ram 3500, then confirm or edit the OEM fields to match your door-jamb placard and wheel markings.
Step 3. Use “Custom wheel size” to test rim diameter, width, and offset changes. Watch inner clearance to the suspension and brakes, and outer “poke” past the fender.
Step 4. Use “Custom tire size” to adjust section width and aspect ratio. The tool recalculates tire diameter as you change rim diameter. Aim to keep overall diameter close to stock to protect gearing, ABS, and speedometer accuracy.
Step 5. Review the comparison for: inner clearance, outer poke, overall tire diameter change, and backspacing. Adjust until all clearances are safe and within your goals.
Fitment Checklist Before You Buy
Verify bolt pattern: 8x165.1 mm must match exactly. Do not assume other 8-lug patterns are the same.
Confirm center bore: 121.3 mm hub size. Aftermarket wheels with a larger bore require hub-centric rings sized to 121.3 mm.
Thread compatibility: M14x1.5. Use the correct lug nut style for your wheel seats and ensure thread engagement equals at least the stud diameter.
Load rating: Wheels and tires must meet or exceed the truck’s GAWR and intended towing or hauling loads.
Brake and suspension clearance: Check spoke and barrel clearance to calipers and knuckles. You need visible, measurable clearance even at full lock.
Fender clearance: Use the calculator to limit outer poke and overall diameter changes. Check bump and steer conditions, not just static fit.
TPMS: If equipped, plan to transfer or program sensors compatible with your wheels.
SRW vs DRW: Single rear wheel and dually wheels are not interchangeable due to offset and rim design differences. Match your axle type.
Plus Sizing And Common Upgrades
Plus sizing can improve stance and tire availability, but keep geometry and load in mind. Use the calculator to test:
Diameter control: Keep overall tire diameter close to stock to minimize speedometer error and performance changes. Many users target within about 3 percent, but always check actual clearance on your truck.
Offset and backspacing: Maintain similar inner clearance to protect against rubbing on control arms, leafs, sway bars, and brake lines. The calculator shows backspacing changes as you adjust offset and width.
Width changes: Wider wheels push tires outward and inward simultaneously. Ensure tires maintain adequate fender coverage and do not contact suspension at full lock or compression.
Towing and payload: Heavier sidewalls and proper load index tires are important on a Ram 3500. Do not downsize load ratings.
Installation Tips
Test fit one wheel first without a tire to confirm hub fit, caliper clearance, and stud engagement.
Clean hub faces and wheel mounting pads. Remove rust and debris so the wheel seats flat.
If using hub-centric rings, install them fully on the wheel and verify snug fit on the 121.3 mm hub.
Hand start all lug nuts to prevent cross-threading. Tighten in a star pattern in stages.
Use a calibrated torque wrench and follow the OEM torque spec for your studs and wheels. Re-torque after 50 to 100 miles.
Check for rubbing at full steering lock and over bumps. Inspect brake hose and ABS wire clearances after a short drive.
What is the bolt pattern on the 2008 Ram 3500? 8x165.1 mm, also written as 8x6.5.
My door placard shows a different wheel or tire size than above. Which is correct? Trust your specific truck’s placard and owner’s manual. The 2008 Ram 3500 came with multiple OEM packages. Enter your exact dimensions in the calculator to compare against potential new wheels and tires.
Do I need hub-centric rings with aftermarket wheels? If the wheel’s center bore is larger than 121.3 mm, use rings that reduce the wheel bore to 121.3 mm so the wheel centers on the hub.
Are dually and single rear wheel wheels interchangeable? No. DRW and SRW wheels usually have different offsets and rim profiles. Use the correct wheel type for your axle.
How do offset and backspacing affect fit? Offset moves the wheel centerline relative to the hub. Backspacing is the distance from the mounting pad to the inner rim edge. Changing offset or width alters inner clearance to suspension and outer poke past the fender. Use the calculator to see these changes before you buy.
Can I run a different wheel diameter than stock? Yes, if it clears your brakes and fenders and the tire’s overall diameter and load rating are appropriate. The calculator updates tire diameter as you change rim diameter so you can keep overall height in a safe range.
What lug nut torque should I use? Torque depends on stud size, wheel material, and OEM guidance. Refer to the service manual or placard for your truck and wheel type, then re-torque after 50 to 100 miles.
Do all 8-lug wheels fit this truck? No. Multiple 8-lug patterns exist that are visually similar but not interchangeable. Only 8x165.1 fits without adapters. Always measure or verify the bolt pattern.
Methodology and sources
Wheel interchange depends on more than bolt pattern. Where data is available, this site compares recorded OEM values:
Bolt pattern / PCD
Center bore direction (donor wheel bore must not be smaller than the hub)
Wheel diameter, width, and offset against known OEM ranges
A normal wheel spacer does not change bolt pattern. Hub rings cannot enlarge a wheel bore that is smaller than the hub. Brake clearance and tire package fitment still require vehicle-specific checks when not confirmed in the dataset.
