2021 GMC Yukon: the quick answer
The 2021 GMC Yukon ships with 275/60R20 tires on the base trim — that's an overall diameter of 33″. The 275 mm width and 60% sidewall ratio give you 165 mm of sidewall cushion between the rim and the road.
Tire fitment
2021 GMC Yukon tire size
The 2021 GMC Yukon base tire size is 275/60R20 — 275 mm wide with a 60% aspect ratio on 20″ rims. 2 OEM sizes are available across trims.
2021 GMC Yukon
275/60R2033″ overall diameter · 165 mm sidewall · ~611 rev/mi
| Trim | Tire size | Rim | Diameter | vs Base |
|---|---|---|---|---|
| SLE/SLT/AT4 ★ | 275/60R20 | 9×20″ | 33″ (838 mm) | — |
| Denali/Denali Ultimate | 275/50R22 | 9×22″ | 32.8″ (833.8 mm) | -0.5% |
Before you buy tires
Match the load index and speed rating from your door-jamb placard — not just the size. If you're switching sizes, keep the overall diameter within ~3% to avoid speedometer error and potential ABS/traction-control issues.
Factory fitment for the 2021 GMC Yukon; verify against your door-jamb placard or owner's manual.
FAQ
What tire size does the 2021 GMC Yukon use?
The base 2021 GMC Yukon uses 275/60R20 tires — 275 mm wide, 60% aspect ratio, on 20-inch rims. The overall diameter is 33″ (838 mm). Higher trims use different sizes — see the table above. Confirm against your door-jamb placard.
Can I use a different tire size on my 2021 Yukon?
Yes, within limits. Keep the overall diameter within about 3% of 33″ to avoid speedometer error and clearance issues. A wider tire may improve grip, but match the load and speed ratings your Yukon requires.
What is the overall diameter of 275/60R20 tires?
275/60R20 tires have an overall diameter of 33″ (838 mm), with a 165 mm sidewall height. That's about 611 revolutions per mile.
The 2021 GMC Yukon tire sizes shown are OEM factory fitments. Confirm your exact tire size, load rating, and speed rating against the door-jamb placard or owner's manual before buying tires.