Here's why a 4-inch minimum is needed and what factors influence the choice:
* Tire Size Variation: 35-inch tires vary slightly in overall diameter. A taller 35-inch tire will require more lift.
* Wheel Backspacing: The wheel's backspacing significantly impacts how much clearance you have. A wider wheel with less backspacing might need more lift to avoid rubbing.
* Suspension Components: The type of lift kit (spring lift, long-arm, etc.) will affect the actual lift achieved. Some kits might advertise 4 inches but provide slightly less or more depending on the vehicle's weight and other factors.
* Fender Trimming and Bump Stop Modification: Even with a 4-inch lift, fender trimming and bump stop modification are almost always necessary to prevent rubbing.
In short: While a 4-inch lift is the *minimum* starting point, aiming for 4.5 to 5 inches often provides a better, safer, and more comfortable ride with 35-inch tires on a YJ. Always consult with a Jeep specialist or off-road shop to determine the best lift kit for your specific setup. They can advise on appropriate components to avoid issues.