What Size Tires Are On A 2018 Gmc Sierra

The 2018 GMC Sierra comes with different tire options depending on the trim level and package chosen. Here is an overview of the different tire sizes available for the 2018 GMC Sierra:

1. Base Sierra, Sierra SLE, and Elevation trims:
These trims come standard with 17-inch wheels and all-season tires. The tire size is P255/70R17, which means the tires have a width of 255mm, an aspect ratio of 70, and fit 17-inch wheels.

2. Sierra SLT:
The SLT trim also comes with 17-inch wheels and all-season tires, but the tire size is slightly larger than the base model. The tire size for the SLT is P265/65R17.

3. Sierra AT4 and Sierra Denali:
The AT4 and Denali trims come with 20-inch wheels and all-terrain tires. The tire size for both trims is 275/60R20.

It’s important to note that tire sizes can vary due to optional packages or aftermarket modifications. Always double-check the tire size on your specific vehicle to ensure the correct tire is being used.

In conclusion, the tire size for the 2018 GMC Sierra varies depending on the trim level. The base Sierra, Sierra SLE, and Elevation trims come with 17-inch wheels and P255/70R17 all-season tires, while the SLT comes with P265/65R17 tires. The Sierra AT4 and Sierra Denali trims come with 20-inch wheels and 275/60R20 all-terrain tires. It’s crucial to verify the tire size on your specific vehicle to ensure proper fitment and performance.

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