Beautiful wheel set, very lightweight and perfectly true out of the box. only have a 120 miles on them so far but they seem to be tough and have given no problems. they are set up for fixed gear on both sides, i wish one side was dedicated to full threads for a freewheel. a freewheel threads on fine but there is not full thread engagement. that being said,all the miles and abuse i have thrown at them have been through a freewheel, and the threads are holding up perfectly.