Could you feel it while driving? If not could it have been an optical illusion created by something on the tire, or on part of teh tire? Even loose lugnuts you will feel by about 35-40mph in my experience.

97tj, Shaved Ford 9 rear, 4:10's, New 35x12.5 BFG KM2's to test!, Warn x8000i, ARB's, Quick Disco's, Hand Throttle, & it's my DD. smile