Oversized tires don't directly cause Jeep death wobble, but they raise the odds and severity. Larger, heavier tires stress every front-end component, wearing the track bar, ball joints, and tie rod ends faster. They also demand more precise alignment, and any wheel imbalance creates stronger vibration that can trigger wobble.
When a Jeep is lifted and fitted with larger tires, the change in suspension geometry affects the caster angle. Lower caster makes the front end less stable at highway speeds. If the caster isn't corrected with adjustable control arms, the Jeep becomes more susceptible to wobble even with otherwise healthy components. Running 35-inch or larger tires on stock or worn steering components is a common recipe for death wobble.
If you've recently put bigger tires on your Jeep — or bought one already modified — it's worth having the front end inspected to confirm the steering and suspension components are up to the task. Ann Arbor to Detroit is a common freeway run, and that's exactly the speed range where tire size and worn components interact badly. Hoover Street Auto Repair can assess your Jeep's front end and let you know whether the components are in good shape for the tires you're running.