GMC Wheel Fitment Guide

52 fitment guides for GMC, covering 2005 to 2027, spanning 5x115, 5x120, 6x120, 6x127, 6x132, 6x139.7, 8x165.1 and 8x180 bolt patterns. Browse the full list below, then open a model for bolt pattern, center bore, OE offset, flush and max wheel sizes, and offset/backspacing conversions.

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GMC Bolt Pattern & Center Bore Notes

Based on the 52 GMC fitment guides we cover, we have documented 8 distinct bolt pattern / center bore combinations across different GMC platforms and model years:

  • 6x139.7 bolt pattern, 78.1mm center bore — 22 models we cover, spanning 2005–2027.
  • 6x120 bolt pattern, 66.9mm center bore — 8 models we cover, spanning 2015–2026.
  • 8x165.1 bolt pattern, 116.7mm center bore — 6 models we cover, spanning 2007–2027.
  • 8x180 bolt pattern, 124.1mm center bore — 6 models we cover, spanning 2015–2024.
  • 5x115 bolt pattern, 70.3mm center bore — 4 models we cover, spanning 2018–2025.
  • 6x127 bolt pattern, 78.1mm center bore — 2 models we cover, spanning 2005.
  • 6x132 bolt pattern, 74.5mm center bore — 2 models we cover, spanning 2007–2013.
  • 5x120 bolt pattern, 66.9mm center bore — 2 models we cover, spanning 2013–2016.

Do not mix platforms: a wheel forged for one GMC bolt pattern / center bore combination will not hub-center correctly on a different one, even if the diameter looks right. Always confirm your exact model and year against the bolt pattern and center bore listed on that model page below before ordering — or send us your VIN or trim level and we will confirm it for you.

Offset and backspacing recommendations vary by trim even within the same bolt pattern, mainly due to differences in brake caliper size and suspension geometry between base and performance trims. Every ANKUSI wheel is forged to your exact target offset, so send us your GMC model, year, and trim and we will confirm the correct spec before production — no guessing required.

How to check the bolt pattern on your GMC

The most common GMC fitment in our guide is 6x139.7 with a 78.1 mm center bore (22 of 52 model years we cover).

  1. Read the stamping on the back of an original wheel: size, offset (ET) and bolt pattern are usually cast into a spoke or the hub pad.
  2. No stamping? Measure center-to-center between two adjacent lug holes. For 6x139.7 that distance is 69.9 mm (PCD × sin(180° / 6)). A 2 mm difference already means a different bolt pattern.
  3. Match generation and year on the model pages below — the same nameplate can change bolt pattern or center bore between generations.

Changing width or offset? Check how far the wheel moves in or out with our offset & backspacing calculator.

Forged Wheels for GMC

Forged-to-order wheel designs matched to GMC bolt patterns. Every set is machined to your exact model, offset and center bore.

Vehicles Using 6x139.7 With a 78.1 mm Center Bore

In our database, 58 other vehicle entries from 5 makes use exactly the same 6x139.7 bolt pattern and 78.1 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); 31.0% of those also use a 78.1 mm center bore.

Hub-Centric Rings for a 78.1 mm Center Bore

A wheel with a center bore larger than 78.1 mm needs a hub-centric ring. The most common combinations:

Wheel boreRing size
84.1 mm84.1 → 78.1 mm
93.1 mm93.1 → 78.1 mm
100.1 mm100.1 → 78.1 mm
106.1 mm106.1 → 78.1 mm

ANKUSI forged wheels are bored to exactly 78.1 mm for this vehicle, so no ring is needed.

Sources and Last Update

Bolt pattern and center bore were checked against at least two independent fitment references before publication.

This record is part of the open ANKUSI Wheel Fitment Dataset (DOI 10.5281/zenodo.23241521, CC BY 4.0).

Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.

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