* Year of the Suburban: Even within the 1985 model year, there might be slight variations.
* Specific trim level: Different trim levels might have slightly different wheel wells or suspension setups.
* Lift kit: Adding a lift kit significantly increases the space available for larger tires. Without a lift, your options are severely limited.
* Backspacing: The distance from the wheel's mounting surface to the inner edge. Incorrect backspacing can cause rubbing.
* Offset: How far the wheel's center line is from the mounting surface. This also affects rubbing.
Without knowing specifics about your particular 1985 Suburban and any modifications you've made, it's impossible to give a precise answer. You'll risk damage to your vehicle if you simply put on the biggest tire you can find.
To find the right size:
1. Check your owner's manual: This will specify the recommended tire size.
2. Measure your wheel wells: Measure the available space in your wheel wells (both width and height). Consider the tire's diameter and width as well as the wheel's size.
3. Consult online forums: Search for forums specific to 1985 Chevy Suburbans. Owners there will likely discuss tire upgrades and the largest sizes they've successfully used. Pay close attention to whether they've made any modifications (lift kits, etc.).
4. Consult a tire professional: A qualified tire shop can assess your Suburban and recommend suitable tire sizes.
Attempting to install tires that are too large without modifications will likely lead to rubbing against the body, suspension, or steering components, causing damage and potentially unsafe driving conditions.
