So, as some of you know, there is a 'B' designation used on the 180/55 PR2, and the 180/55 & 190/55 PR3. Michelin says that it is "specifically designed for loaded sport tour riding or riding two up". Is this just marketing mumbo jumbo? I don't fancy too many people going down to the 180 on the C14, more people going up to the 190/55. I'm just trying to figure out if I will get extended mileage, better wet grip, or just "piece of mind" from the 'B' tire. Any feedback or comments are appreciated!