2018 Mercedes-Benz GLS AMG GLS63
The 2018 Mercedes-Benz GLS AMG GLS63 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 GLS
Tire geometry â 295/40R21
The 295/40R21 fitted to the 2018 Mercedes-Benz GLS has a section width of 295mm and an aspect ratio of 40%, mounted on a 21-inch rim. That gives a sidewall height of 118.0mm (4.65") and an overall outside diameter of 769.4mm (30.29"). At highway speed this tire completes roughly 414 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 GLS while keeping the speedometer accurate, target a 305/35R22 (plus-one). For a softer ride or winter setup, a 285/46R20 (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 GLS uses a 5x112 bolt pattern with a 66.6mm hub bore. Safe rim width range for the OEM tire is 9.5J â 10.5J, and offsets in the ET41 â ET51 window will clear suspension and fender without rubbing on most setups.
Tire pressure guidance
Manufacturer-recommended cold tire pressure for the 2018 Mercedes-Benz GLS 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 GLS63 | 295/40R21 | 21" x 10.0 | ET46 |
Frequently Asked Questions
What tire size does the 2018 Mercedes-Benz GLS AMG GLS63 use?
The 2018 Mercedes-Benz GLS AMG GLS63 uses 295/40R21 tires as standard equipment.
What is the bolt pattern of the 2018 Mercedes-Benz GLS AMG GLS63?
The 2018 Mercedes-Benz GLS AMG GLS63 has a 5x112 bolt pattern with a center bore of 66.6mm.
What is the wheel offset of the 2018 Mercedes-Benz GLS AMG GLS63?
The 2018 Mercedes-Benz GLS AMG GLS63 has a wheel offset of ETET46.