Just a final note, because I hate it when people post issues and not the resolutions. I swapped tires between the SS clone, which wore a 90/90 Road Rider and the Titanic, a 100/90. It took much less weight to static balance the larger tire this time and still only one weight to balance the smaller one. The 90/90 seems to perform just fine with no buzz or wobble on the Titanic and the 100/90 feels better on the parts-bin special SS clone (750 frame Mk III yokes). There's still a slight buzz at speed, but I'm gonna live with it unless it gets worse.