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
8x180
Center bore
124.1 mm
Thread
M14 x 1.5
Tire size
275/55R20 · 285/50R20 · 285/45R22

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

Lug hardware

More on Amazon

  • MIKKUPPA M14x1.5 Wheel Lug Nut - Replacement for Chevy Silverado 1500 2500, GMC, Ford, Ram, Aftermarket Wheel - 32pcs Black Closed End Lug Nuts with 1 Socket Key

    Catalog match for this vehicle. Confirm seat type and wheel style before buying.

    Check price on Amazon

  • Dorman 611-236 Wheel Nut M14-1.50 Flattop Nut - 22mm Hex, 44.5mm Length Compatible with Select Models, 10 Pack (OE Fix)

    Catalog match for this vehicle. Confirm seat type and wheel style before buying.

    Check price on Amazon

  • White Knight 1309-1S-20AM Chrome M14x1.50 Open-End Bulge Acorn Lug Nut, 20 Pack

    Catalog match for this vehicle. Confirm seat type and wheel style before buying.

    Check price on Amazon

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.

    View full build on Modified1

    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.