These wheels are incredible. Been pounding on them for over 2 months now. Not a ding or dent. They are really the very best wheelset out there. I've had Mavics for years. Always tweaking this, adjusting that. Not with these. Everyone can hear me coming. Couple of my buds are hooking up with them now just so they dont have to listen to the zzzzzzzzzzzzzz......zzzzzzzz.....zzzzzzzz all the time on the trails. The Iodines are literally riding bliss. The very best wheelset for XC/all mountain riding.