I find the ride on 606's to be harsh on pavement when the tire is at recommended air pressure. I have taken to keeping them slightly under pressure, and will accept that they won't get as many miles out of them. At speed on pavement, the noise and vibes weren't acceptable for me. At moderate speeds and all off-road riding, I am totally satisfied with the 606's.
Life is a mortal adventure. Don't avoid all the risks.
2005 KLR650, ready for the world
1999 KLR650, badly in need of TLC...
1998 Honda Valkyrie Tourer
2001 DRZ400e, already broken... in