* Trim Level: Different trim levels of the Avalanche may have slightly different wheel wells and suspension setups.
* Specific Options: Things like the factory suspension package (if any specific off-road package was selected) can affect clearance.
* Tire Type: The overall diameter of a tire depends not only on the sidewall height but also the wheel diameter and the tire's aspect ratio. A taller tire with a narrower width might fit where a shorter, wider tire wouldn't. All-terrain tires tend to run larger than comparable street tires.
To find the answer for *your* specific Avalanche, you need to consider:
1. Measure your current tire size: This is usually found on the sidewall (e.g., P265/70R17).
2. Research online forums: Chevy Avalanche forums (like those on sites dedicated to GM trucks) are your best bet. Search for threads discussing tire upgrades. People there will have documented their experiences with different tire sizes, often including photos showcasing clearance issues.
3. Consult a tire professional: A reputable tire shop can advise based on your Avalanche's year, trim, and existing setup. They have access to databases and can check for potential rubbing issues.
While you might find suggestions of slightly larger tires (perhaps going up one size in the tire's overall diameter), any significant increase will likely require modifications like:
* Wheel spacers: These can push the wheels outward, potentially increasing the chances of rubbing.
* Lift kit: Raising the suspension gives you significantly more room.
* Fender trimming/flares: This allows more clearance even with a larger tire and wheel combination.
Without modifications, exceeding the manufacturer's recommended tire size will almost certainly cause rubbing on the fenders, suspension components, or other parts of the vehicle, leading to premature tire wear, damage, and potentially unsafe driving conditions.
