I think the 606 may be a little noisier than some want but my set worked well on the street. I was surprised at how much traction they had in corners. I'm not a canyon carver by any stretch but went too hot into a couple of corners and had to do the "steady throttle, lean - Lean - LEAN" mantra in my head and they hung on.
Hold up well in the rocky stuff, too.
'07 WR450 2013 HD Road King '73 Hodaka Wombat