Got rid of the crappy roadsmart on the front of my bike and shoehorned on the PR3. I currently have a pr3 front and pr2 rear. I needed a rear really really bad mid-trip and the local shop had the pr2 in stock. These tires are amazazing. With the luggage off and the suspension set on angry, this bike is about the best handling bike I've ever sat on. I nudge the handlebars and it falls to just the right lean in the corner, and if I need a little more she just does it instinctively, and never tries to fall over, just steers around the pothole/slow car.
for tbunder, the 110/80 avon roadrider I was running on the stock front end measured 116mm. Those numbers on the side are just a size like shoes - some run big, some run small.