What size tires are on a 2012 Chevy Avalanche?
The 2012 Chevrolet Avalanche does not have a single universal tire size; it varies by trim level and wheel package. The most common factory configurations use 18-inch or 20-inch wheels, typically around 275/65R18 or 275/55R20, respectively.
To determine the exact tire size on a specific vehicle, consult the driver’s door placard, the owner's manual, or the vehicle’s build sheet. The tire size is also printed on the sidewall of each tire (for example, P275/65R18 or P275/55R20). If tires or wheels have been swapped by a previous owner, the current size may differ from the original equipment.
Common factory configurations by wheel size
Below are the most frequently observed OEM tire sizes associated with typical Avalanche wheel packages. Remember: trim, options, and aftermarket changes can alter the exact size.
- 18-inch wheels: commonly 275/65R18
- 20-inch wheels: commonly 275/55R20
Note that some early or specialty configurations could use different sizes, so always verify on the vehicle itself rather than relying solely on memory or assumption.
How to verify the exact size on your vehicle
Use these methods to confirm the current tire size installed on your 2012 Avalanche.
- Check the door placard: Look for a “Tire Size” entry on the driver’s door jamb; this shows the original equipment size.
- Inspect the tire sidewall: The size is printed directly on the tire, in a format such as P275/65R18 or LT275/55R20.
- Consult the owner's manual or the build sheet: These documents list the original tire size for your model and trim.
- Contact Chevrolet with the VIN: If you’re unsure, a dealership can pull the exact OE size for your specific truck.
Knowing the exact size is important not only for fitment but also for maintaining proper speedometer accuracy, handling, and safety systems.
Why tire size matters
Using the correct tire size ensures proper speedometer readings, traction control, ABS performance, and load handling. Mismatched sizes can affect braking distance, ride quality, and fuel economy. If you’re replacing tires, aim to match the original equipment size or consult a tire professional when making any changes to wheel diameter or aspect ratio.
Summary
The 2012 Chevy Avalanche did not have a single tire size; it varied with trim and wheel choice. The most common OEM configurations feature 18-inch wheels with roughly 275/65R18 tires and 20-inch wheels with about 275/55R20 tires. To confirm the exact size on any given vehicle, check the door placard, the tire sidewalls, the owner’s manual, or the VIN with a Chevrolet dealer. If tires or wheels have been changed, the current size may differ from the original equipment.
