My gumby question for the day. Had both front and rear tyres replaced a week ago. Noticed the old balancing weights have been removed but there are no new ones. Would that be normal/likely when balancing the wheel. Went for the first descent ride on the new tyres and felt more vibration than I am used to. Could this be a balance issue (vibration not a wobble sensation). Could also be that I am not used to the tread pattern on the new tyres and am being paranoid. They are Metzler tourance next.