I'm on my second set of these. I semi retired the first set with almost 10k miles on them, replacing them when I got a killer deal on a second set. The first set is now set up for backups when I do ultra races. I haul them around, but have never had to use them. For Big guys, I highly recommend them. BTW the second set recently purchased has Silky Smooth bearings, right out of the box. The first set took a couple hundred miles to get that way. Also I have never had to retension or retrue either set..