01 Accord 4 Cyl AT–Thumping Stumper

01 Accord 4 cyl, AT, 50K: Repetitive thumping noise from right front (and right front only) at 10 mph and up. Noise varies with road speed. No clunking, grinding, popping from CV joints. I can duplicate noise with car up on jack stands with wheel on or off so I don’t think it is tire noise (although it sounds very much like severely out of round tire noise). No abnormal play or noise from the wheel bearing. Noise is present with transmission in any gear including neutral with car coasting. I haven’t experienced any transmission problems common to the Gen6 Accords-yet. I’m at loss. Ideas?