After these glitches, things were good. Per a 2007 rule change, the quickest six riders rode on new tires in every round. Unscrubbed, the D209s took at least two laps before full-tilt lean angles could be applied. Once warm, they provided predictable, high-level grip that enabled test riders to push the limits of these incredible sportbikes. Because the tires wore so well, some riders (including me) felt they worked better later in their life cycle. Those Dunlops demonstrated impressive performance under some very tough circumstances.