the stock IRO wheelsets are good. I no longer use the front wheel because of a very high speed collision into a curb at the bottom of a hill(steep hill+sharp turn at the bottom+ oncoming car, try to jump the curb or hit a car that was moving while i was going 30+ mph, i took my chances with the curb.), but the rear one has been holding up fine and I haven't had to have it trued in a little shy of 2 years when i got the bike.