As you can see from the center of my tire, I ran these pretty hard on the highway for MANY miles and they squared off.
The Michelin tires above have a dual compound, hard in the middle and softer on the sides so they won't square off as bad or as fast when I have to hit the highway a lot. The Pirelli tires are designed for high mileage as well.
The tires I'm looking at are sport-touring tires and should last quite a bit longer and square off less than the Metzeler M3 tires.
The Metzeler M3 that your son picked up should provide more grip throughout the life of the tire. I can't speak to the quality or usability as I have never run that tire before.
unless your doing TONS and TONS of wet rain riding the road 2's will be plenty.
Hell i actually went back to a road 2 in the rear from pilot power 2ct's cus they just last longer and offer PLENTY of grip.
I do TONS of twisty riding but have been finding myself using the moto around town and the short 8 mi commute to school... the power 2ct wore the center out rather quick (went through it in 2500mi, and 2800on the power 2ct before that) ... so i switched back to a road 2 in the rear and have been pleasantly surprised.... i though i would sacrifice some girp... but in all honesty and i have TRIED to break it loose (talking mid corner in first wacking the throttle) ... and the front tire just comes up.
I'll be interested to hear about the differences you find, if any, going from the PR2 to the PR3.
Then again, it's always hard to compare tires unless you're replacing brand new x tires with brand new y tires. Comparing the new PR3 tires to what you remember the PR2 tires were 9000 miles ago seems a little difficult and unscientific.
From what I've read the PR3's are suppose to have better wet traction. All I know is that when I rode the parkway in May I was told by the people behind me that I was throwing a 10ft rooster tail in the air and it felt like I was riding on dry pavement with the PR2's. I got the PR3's for free https://www.wristtwisters.com/forums/...ree-30182.html so I figured I would try the PR3's out.