There are several reasons why a steering wheel may wobble or shake while driving. Here are some of the most common causes, according to the search results:

1. Unbalanced or misaligned tires: This is the most common cause of a shaky steering wheel. Unbalanced tires can impact your suspension and axle, which leads to steering wheel vibrations. Misaligned tires can also cause steering wheel shaking or vibrations.

2. Warped brake rotors: If your brake rotors are warped, it can cause your steering wheel to shake when you brake. This is a common cause of steering wheel wobble.

3. Tire balancing issues: If your tires are not balanced properly, it can cause your steering wheel to shake. This is another common cause of steering wheel wobble.

4. Sticking brake caliper: This is an unusual cause of steering wheel shaking, but it can happen. Stuck brake calipers can cause your steering wheel to shake.

5. Wheel bearings, tie rod ends, or ball joints: If these components are damaged, it can cause your steering wheel to wobble or shake.

6. Axle issues: An unbalanced axle shaft can cause your steering wheel to shake along with the rest of the vehicle.

Its important to address any issues with your steering wheel as soon as possible, as ignoring them can allow underlying issues to grow into larger problems for your car.