Matte White Custom Forged Wheels
Off-Road · Matte White
2009 Hummer H3T Alpha Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Hummer H3T Alpha wheels? This page gives the 2009 Hummer H3T Alpha bolt pattern (6x139.7), centre bore, factory rim size and the offset range for aftermarket and forged Hummer H3T Alpha rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 2009 Hummer H3T Alpha uses a 6x139.7 bolt pattern with a 100.3 mm centre bore and M12x1.5 lug nuts. Factory wheels: 16x7.5J ET38. For aftermarket wheels, 17x9J ET12 sits flush.
Forged wheels for the 2009 Hummer H3T Alpha — drilled 6x139.7 with a 100.3 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
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Hummer H3T Alpha (2009): 6x139.7 bolt pattern, 100.3mm center bore, OE 16x7.5J ET38. Forged wheel fitment specs from ANKUSI.
Bolt Pattern6x139.7
Wheel Bolt/NutM12x1.5 Nut
Center Bore100.3mm
Wheel Load Rating900–1250 kg/wheel (SUV segment reference)
Year2009
Category6-Lug Off-Road (Beadlock)
Data check: published sources disagree on part of this vehicle's hub data, and we are reviewing it. Measure your hub or ask us before ordering. How we verify
Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Factory (OE) | 16x7.5J ET38 |
| Flush Fitment | 17x9J at ET12 offset |
Forged Wheel Designs for the Hummer H3T Alpha
Every design below is forged to order, so it can be machined to the Hummer H3T Alpha's 6x139.7 bolt pattern and 100.3 mm center bore, with the width and offset calculated for your setup.
KMC-Style Gloss Black Web-Cage Off-Road Forged Wheels
Off-Road · Gloss Black
Custom Finish Exposed Bolt Detail Double Ring Lip Forged Wheels
Off-Road · Custom Finish
Gunmetal Mesh Forged Wheels
Off-Road Beadlock · Gunmetal
KMC-Style Polished Mesh Double-Ring Beadlock Off-Road Forged Wheels
Off-Road Beadlock · Polished
GPS 4x4-Style Army Green 6-Spoke Beadlock Off-Road Forged Wheels
Off-Road Beadlock · Army Green / Black-white Ring
Braid-Style Gloss Black 15-Spoke Off-Road Forged Wheels
Off-Road · Gloss Black
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
Off-road platforms put real, repeated impact loads through the wheel that street-only vehicles never see, so the factory strength margin on the Hummer H3T Alpha isn't a formality — it's load-bearing in a literal sense. Forging matches that margin at a lower rotational weight than an equivalent cast wheel, which matters both on the trail and on the highway miles between trailheads.
The Hummer H3T Alpha ships from the factory on a 6x139.7 bolt pattern with a 100.3mm center bore and a 16x7.5J ET38 wheel. Our flush reference for the Hummer H3T Alpha is 17x9J ET12.; our maximum aggressive reference is 18x10J ET-12. — beyond that, expect clearance issues against the fender liner without further modification.
Hummer H3T Alpha OE Wheel Specs
The Hummer H3T Alpha ships from the factory on 6x139.7 bolt pattern wheels with a 100.3mm center bore. The stock wheel size is 16x7.5J ET38, 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 Hummer H3T Alpha (2009) we drill the 6x139.7 pattern and cut the centre bore to 100.3mm 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.
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) | 16x7.5J | ET38 | 5.75 in (146 mm) | — | — |
| Flush | 17x9J | ET12 | 5.47 in (139 mm) | −7 mm | +45 mm |
| Maximum | 18x10J | ET-12 | 5.03 in (128 mm) | −18 mm | +82 mm |
Vehicles With the Same Hub as the Hummer H3T Alpha (6x139.7, 100.3 mm Bore)
In our database, 13 other vehicle entries from 3 makes use exactly the same 6x139.7 bolt pattern and 100.3 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.
6x139.7 is used by 4.0% of the vehicle pages in our English fitment guide (258 of 6,503); 5.4% of those also use a 100.3 mm center bore.
Hub-Centric Rings for a 100.3 mm Center Bore
A wheel with a center bore larger than 100.3 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 106.1 mm | 106.1 → 100.3 mm |
| 108.1 mm | 108.1 → 100.3 mm |
| 110.1 mm | 110.1 → 100.3 mm |
| 130.1 mm | 130.1 → 100.3 mm |
ANKUSI forged wheels are bored to exactly 100.3 mm for this vehicle, so no ring is needed.
Frequently Asked Questions
What bolt pattern (PCD) does the Hummer H3T Alpha use?
The 2009 Hummer H3T Alpha uses a 6x139.7 bolt pattern.
How many lug bolts does the Hummer H3T Alpha use?
The Hummer H3T Alpha uses a 6-lug bolt pattern (6x139.7), so you need a 6-lug forged wheel to bolt straight on.
What is the center bore size on the Hummer H3T Alpha?
The Hummer H3T Alpha's center bore is 100.3mm. 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 Hummer H3T Alpha?
Factory wheels on the Hummer H3T Alpha are 16x7.5J ET38.
What does a flush wheel fitment look like on the Hummer H3T Alpha?
For a flush look with minimal to no rubbing, we recommend 17x9J at ET12 offset as a starting point on a stock or mildly lowered Hummer H3T Alpha.
Do I need wheel spacers for my Hummer H3T Alpha?
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 Hummer H3T Alpha?
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 Hummer H3T Alpha?
The Hummer H3T Alpha 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: 16x7.5 wheels · 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.