It bemuses that a 'hi-techy' company such as Zipp has so many hub problems. I've had some Token C50 wheels for over 10 years, and the cheapo, re-badged American Classic hubs on them have never missed a beat. They still run very smoothly, especially the front (understandably), even though the front is the Micro model with the small cartridge bearings that some "expert" on a forum said only last 3,000km -- what a joke. Ha.