WheelOffset

2012 GMC Sierra 2500HD Wheel Offset

Quick specs

Wheel size
8.5x20 · 9x20 · 9x22
Offset
ET40 · ET35
Backspacing
5.82 in · 5.88 in
Bolt pattern
8×180
Center bore
124.1 mm
Thread
M14×1.5
Tire size
275/55R20 · 285/50R20 · 285/45R22

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Showing matching bolt patterns and offsets up to 30 mm lower. Confirm center bore, load rating, and clearance at Tire Rack.

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OEM configurations

ConfigurationRimOffsetBackspacingTireBolt patternCenter boreThread
6.0i · V8, Petrol8.5x20ET405.82 in275/55R208x180124.1 mmM14 x 1.5
6.0i · V8, Petrol9x20ET355.88 in285/50R208x180124.1 mmM14 x 1.5
6.0i · V8, Petrol9x22ET355.88 in285/45R228x180124.1 mmM14 x 1.5
6.6TD · V8, Diesel8.5x20ET405.82 in275/55R208x180124.1 mmM14 x 1.5
6.6TD · V8, Diesel9x20ET355.88 in285/50R208x180124.1 mmM14 x 1.5
6.6TD · V8, Diesel9x22ET355.88 in285/45R228x180124.1 mmM14 x 1.5

Wheels and hardware

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Real-World 2012 GMC Sierra 2500HD Wheel Setups

Observed aftermarket setups from documented Modified1 builds. These are individual build records — not OEM specifications and not clearance guarantees for every vehicle.

Common custom wheel sizes

Among builds in our database for this model year:

  • 20-inch — 1 documented build

1 documented build.

2012 GMC Sierra 2500HD custom wheel setup

Staggered · 20×? / Rear unknown

Documented on a 2012 GMC Sierra 2500HD build — observed custom fitment, not a universal fit guarantee.

Wheel: Hostile Havoc-8

Front
20×?
Rear
—
Compared with OEM

Compared with the 20×8.5 ET40 OEM configuration. Calculated geometry only — not fit confirmation.

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    See how a different width or offset sits versus an OEM configuration for this year.

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    More specs for the 2012 GMC Sierra 2500HD

    Each OEM row is a catalog configuration. Offset ranges are not collapsed when the database has exact setups. Documented aftermarket builds are observed setups only — not universal fit or clearance confirmation.