i really had no idea.....i though i was building a nice light, strong wheel. i'm not exactly rich either.....just a single guy (when i bought the wheels) who's been working hard since i was 13.i think i may have a bad batch though....if you look at all the heads they don't look like they were pressed properly. they have this circle in the center of them, not smooth over the spoke head. they could be deffective.....most of them have this "ring" on the heads but not all.....this "ring" is not present on any other wheel i have.....reguardless.....not worth the money which is why i made the post.edit: i'm at about 24-25 lbs so im not exactly riding the lightest bike in town either......i might be riding the only flat bike in town, but not the lightest