I get it too (at low speed and hands free)...is it a "bearing" issue? I was thinking of changing tires 'cause someone suggested "cupping" was a factor.When you experienced a low speed wobble were you hands free? I experienced this an found that a replacement neck bearing ( all balls) fixed the problem. It won't get better. Just remember to have the new bearing checked again after about 6000 miles just normal wear! My 2 cents! Keep the rubber on the road!