I found my E-4(front) was starting to get a mild 30 MPH wobble and though it was very mild,I was starting to get concerned

Knowing we had about a 180 mile ride today,I decided to check my tire pressures,the rear was 39,took it to the usual 40,checked the front,down to 30

.I took it back up to my usual 35,and no wobble.
