2023 GMC Hummer EV Edition 1
The 2023 GMC Hummer EV Edition 1 tire size and wheel specifications below reflect standard OEM reference fitment data for this trim level.
Detailed tire and wheel breakdown for the 2023 GMC Hummer EV
Tire geometry â 305/70R18
The 305/70R18 fitted to the 2023 GMC Hummer EV has a section width of 305mm and an aspect ratio of 70%, mounted on a 18-inch rim. That gives a sidewall height of 213.5mm (8.41") and an overall outside diameter of 884.2mm (34.81"). At highway speed this tire completes roughly 360 revolutions per kilometre, which is what your speedometer and odometer are calibrated against.
Plus-sizing window
If you want to upsize wheels on the 2023 GMC Hummer EV while keeping the speedometer accurate, target a 315/64R19 (plus-one). For a softer ride or winter setup, a 295/77R17 (minus-one) keeps the overall diameter within Âą3% of stock, which is the industry tolerance for ABS and stability control to stay calibrated.
Wheel fitment specs
The 2023 GMC Hummer EV uses a 8x165.1 bolt pattern with a 117.0mm hub bore. Safe rim width range for the OEM tire is 8.5J â 9.5J, and offsets in the ET18 â ET28 window will clear suspension and fender without rubbing on most setups.
Tire pressure guidance
Manufacturer-recommended cold tire pressure for the 2023 GMC Hummer EV is printed on the driver-side door jamb sticker â always defer to that value, not to the maximum pressure printed on the tire sidewall. Check pressure monthly and before long trips; under-inflation by 20% can reduce tread life by 25%.
Fitment Specifications
| Engine & Trim | Tire Size | Rim Size | Offset (ET) |
|---|---|---|---|
| Edition 1 | 305/70R18 | 18" x 9.0 | ET23 |
Frequently Asked Questions
What tire size does the 2023 GMC Hummer EV Edition 1 use?
The 2023 GMC Hummer EV Edition 1 uses 305/70R18 tires as standard equipment.
What is the bolt pattern of the 2023 GMC Hummer EV Edition 1?
The 2023 GMC Hummer EV Edition 1 has a 8x165.1 bolt pattern with a center bore of 117.0mm.
What is the wheel offset of the 2023 GMC Hummer EV Edition 1?
The 2023 GMC Hummer EV Edition 1 has a wheel offset of ETET23.