2018 Mercedes-Benz G-Class AMG G63
The 2018 Mercedes-Benz G-Class AMG G63 tire size and wheel specifications below reflect standard OEM reference fitment data for this trim level.
Detailed tire and wheel breakdown for the 2018 Mercedes-Benz G-Class
Tire geometry â 275/50R20
The 275/50R20 fitted to the 2018 Mercedes-Benz G-Class has a section width of 275mm and an aspect ratio of 50%, mounted on a 20-inch rim. That gives a sidewall height of 137.5mm (5.41") and an overall outside diameter of 783.0mm (30.83"). At highway speed this tire completes roughly 407 revolutions per kilometre, which is what your speedometer and odometer are calibrated against.
Plus-sizing window
If you want to upsize wheels on the 2018 Mercedes-Benz G-Class while keeping the speedometer accurate, target a 285/44R21 (plus-one). For a softer ride or winter setup, a 265/57R19 (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 2018 Mercedes-Benz G-Class uses a 5x130 bolt pattern with a 84.1mm hub bore. Safe rim width range for the OEM tire is 9.0J â 10.0J, and offsets in the ET45 â ET55 window will clear suspension and fender without rubbing on most setups.
Tire pressure guidance
Manufacturer-recommended cold tire pressure for the 2018 Mercedes-Benz G-Class 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) |
|---|---|---|---|
| AMG G63 | 275/50R20 | 20" x 9.5 | ET50 |
Frequently Asked Questions
What tire size does the 2018 Mercedes-Benz G-Class AMG G63 use?
The 2018 Mercedes-Benz G-Class AMG G63 uses 275/50R20 tires as standard equipment.
What is the bolt pattern of the 2018 Mercedes-Benz G-Class AMG G63?
The 2018 Mercedes-Benz G-Class AMG G63 has a 5x130 bolt pattern with a center bore of 84.1mm.
What is the wheel offset of the 2018 Mercedes-Benz G-Class AMG G63?
The 2018 Mercedes-Benz G-Class AMG G63 has a wheel offset of ETET50.