ASE Suspension and Steering Multiple Choice Practice Test

Question 1 of 3
67% Get this Question Right
The front end of a vehicle vibrates up and down while traveling at most road speeds. Technician Y says that too much radial runout of the front tires could be the cause. Technician Z says that static out-of-balance of the front tires could be the cause. Who is right?
Z only
Neither Y nor Z
Both Y and Z
Y only