2023 Mercedes-Benz GLS450 — 4MATIC
The 2023 Mercedes-Benz GLS450 4MATIC shipped with 3 different factory tire sizes, depending on the wheel package it left the factory with (this can also reflect a staggered front/rear setup). Check your tire sidewall or door placard to confirm which one applies to your vehicle.
This trim shipped with more than one tire size (staggered fitment, front/rear, or optional wheel package). Confirm which one matches your vehicle by checking your tire sidewall or door placard.
275/50R20
| Section width | 275 mm |
|---|---|
| Aspect ratio (sidewall height) | 50% (137.5 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~30.8" |
| Revolutions per mile | ~654 |
Compare prices at:
275/45R21 (Front)
| Section width | 275 mm |
|---|---|
| Aspect ratio (sidewall height) | 45% (123.8 mm) |
| Rim diameter | 21" |
| Overall tire diameter | ~30.7" |
| Revolutions per mile | ~656 |
Compare prices at:
315/40R21 (Rear)
| Section width | 315 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (126 mm) |
| Rim diameter | 21" |
| Overall tire diameter | ~30.9" |
| Revolutions per mile | ~652 |
Compare prices at:
What this size means for your Mercedes-Benz GLS450
On the 2023 Mercedes-Benz GLS450 4MATIC, the factory 275/50R20 measures about 30.8″ in overall diameter with a 137.5 mm (5.4″) sidewall, and completes roughly 654 revolutions per mile. Its 50-series aspect ratio gives a balanced everyday-passenger profile — enough sidewall to soak up road shock while keeping steering response crisp. In tire terms it is a large-diameter fitment.
The 275/50R20 and 275/45R21 roll within 0.1″ (0.3%) of each other in overall diameter, so they are interchangeable from a speedometer standpoint — the second size is an optional wheel package rather than a different rolling size.
Other 2023 Mercedes-Benz GLS450 trims
- 4MATIC 22-23 Inch Wheels 285/45R22 (Front) / 325/40R22 (Rear) / 285/40R23 (Front) / 325/35R23 (Rear)
Mercedes-Benz GLS450 tire sizes by year
- 2026 Mercedes-Benz GLS450 275/50R20 / 275/45R21 (Front) / 315/40R21 (Rear)
- 2025 Mercedes-Benz GLS450 275/50R20 / 275/45R21 (Front) / 315/40R21 (Rear)
- 2024 Mercedes-Benz GLS450 275/50R20 / 275/45R21 (Front) / 315/40R21 (Rear)
- 2022 Mercedes-Benz GLS450 275/50R20 / 275/45R21 (Front) / 315/40R21 (Rear)
- 2021 Mercedes-Benz GLS450 275/50R20 / 275/45R21 (Front) / 315/40R21 (Rear)
- 2020 Mercedes-Benz GLS450 275/55R19 / 275/50R20 / 275/45R21 (Front) / 315/40R21 (Rear)
- 2019 Mercedes-Benz GLS450 275/55R19 / 275/50R20
- 2018 Mercedes-Benz GLS450 275/55R19 / 275/50R20
- 2017 Mercedes-Benz GLS450 275/55R19 / 275/50R20
How to read a tire size
A tire size like 225/45R17 breaks down into three parts:
the first number is the section width in millimeters
(the tire's width from sidewall to sidewall), the second is the
aspect ratio — the sidewall's height as a percentage of
that width — and the number after the "R" is the rim
diameter in inches. A letter prefix (P or LT) indicates
Passenger or Light Truck construction; its absence usually means
Euro-metric sizing.
Some trucks and off-road tires instead use "flotation" sizing, like
37X12.50R17 — here the numbers are the tire's overall
diameter and width in inches directly, with the rim diameter last.
Always verify against the tire information placard on your driver's-side door jamb or your owner's manual before purchasing — tire size can vary by factory option package even within the same trim.