What size tires go on a 2008 Chevy Avalanche?
There isn’t a single tire size for every 2008 Avalanche; the size depends on the factory wheel package. The typical OEM configurations you’ll see are 17-inch wheels with P265/65R17, 18-inch wheels with P275/60R18, and 20-inch wheels with P275/55R20.
The 2008 Avalanche was offered in multiple trims and wheel options, so the exact tire size varies. When replacing tires, you should verify the correct size for your specific vehicle to avoid clearance or speedometer issues and to maintain proper load handling.
Common factory tire sizes by wheel size
These are representative sizes for the most common wheel configurations. Always double-check your own vehicle’s sticker or VIN-based documentation before purchasing.
- 17-inch wheels: P265/65R17
- 18-inch wheels: P275/60R18
- 20-inch wheels: P275/55R20
Note: Tire width and aspect ratio can vary by trim level and regional variations. If your Avalanche has a different wheel package or optional tires, the size may differ from the ones listed above.
How to confirm your exact size
To confirm your exact size, check these sources that carry the official tire size for your specific vehicle.
- Driver’s door jamb sticker: This label shows the recommended tire size for front and rear, plus inflation pressures.
- Owner’s manual or service manual: The manual lists the factory tire size for each trim and wheel option.
- VIN or build sheet: A GM dealer can look up your exact configuration by VIN to confirm the correct size.
When replacing tires, match the size shown on the door sticker, including the tire type (P for passenger car), aspect ratio, and wheel diameter. If you’re upgrading to a larger or smaller size, consult a tire professional to ensure proper clearance and accurate speedometer readings.
Upgrading or changing tire sizes
Consider the implications of changing your tire size, such as speedometer accuracy, ABS/traction control operation, and ground clearance. Larger wheels typically require low-profile tires and can affect ride quality and fuel economy. Always verify with a professional if you plan to deviate from stock sizes.
- Speedometer and gearing: Changes in overall diameter can throw off speed readings unless corrected.
- Clearance: Bigger or wider tires may rub on suspension components or fenders.
- Load rating and inflation: Ensure the new tires meet or exceed the vehicle’s load requirements and recommended pressures.
In practice, many owners stick to stock sizes or use sizes very close to stock to preserve handling, ride, and instrumentation. If you’re unsure, consult a tire shop or Chevrolet dealer for guidance tied to your specific build.
Summary
The 2008 Chevy Avalanche does not have one universal tire size; it varies by wheel package. Typical factory configurations include 17-inch wheels with P265/65R17, 18-inch wheels with P275/60R18, and 20-inch wheels with P275/55R20. Always verify the exact size on the door sticker or via the vehicle’s VIN/build documentation, and consult a tire professional before changing sizes to ensure proper clearance, speedometer accuracy, and load handling.
