Were you going around 45 mph when you noticed this...if so you are not alone...I noticed a very similar event at around 45-50 miles an hour...as has Fishercat...I also assume you have a BA and not the speedmaster...if so it seems to be the tire...I have noticed that it seems to be less severe as I put more miles on it...Fishercat (Ron) assures me it goes away compleatly...he even went as far as to have the dealership check the balance of the tires when he first noted it....no balance issue...AFTER you have checked the other things noted here AFTER...and ruled them out...give it some time and see if it gets better...mine is and Rons did...again this is after you check to be sure that everything is in order and nothing is out of whack or damaged...if all seems well its prob that cheap bridgstone tire...ride that till it needs to be replaced then go with an Avon or Metzler
