2026 GMC Yukon — AT4
The 2026 GMC Yukon AT4 came from the factory equipped with 275/60R20 tires. If your vehicle has since been fitted with aftermarket or upsized wheels, your actual tire size may no longer match this factory spec — always confirm against your door placard before buying.
275/60R20
| Section width | 275 mm |
|---|---|
| Aspect ratio (sidewall height) | 60% (165 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~33" |
| Revolutions per mile | ~611 |
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What this size means for your GMC Yukon
On the 2026 GMC Yukon AT4, the factory 275/60R20 measures about 33″ in overall diameter with a 165 mm (6.5″) sidewall, and completes roughly 611 revolutions per mile. Its 60-series aspect ratio gives a taller, comfort-biased sidewall that favors ride quality and shrugs off rough pavement. In tire terms it is a large-diameter fitment.
Other 2026 GMC Yukon trims
- AT4 Ultimate 275/60R20
- Denali 275/60R20 / 275/50R22 / 285/40R24
- Denali Ultimate 275/50R22 / 285/40R24
- Elevation 275/60R20 / 275/50R22
- XL AT4 275/60R20
- XL AT4 Ultimate 275/60R20
- XL Denali 275/60R20 / 275/50R22 / 285/40R24
- XL Denali Ultimate 275/50R22 / 285/40R24
- XL Elevation 275/60R20 / 275/50R22
GMC Yukon tire sizes by year
- 2025 GMC Yukon 275/60R20
- 2024 GMC Yukon 275/60R20
- 2023 GMC Yukon 275/60R20
- 2022 GMC Yukon 275/60R20
- 2021 GMC Yukon 275/60R20
- 2020 GMC Yukon 275/55R20 / 285/45R22
- 2019 GMC Yukon 275/55R20 / 285/45R22
- 2018 GMC Yukon 275/55R20 / 285/45R22
- 2017 GMC Yukon 275/55R20 / 285/45R22
- 2016 GMC Yukon 275/55R20 / 285/45R22
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.