They have a special left flange to let you build radially. The axle and driveshell are black, normal King is silver. Other than that, there's no difference. You can even upgrade it with a new ISO Disc hubshell if you want to use the hub for a new disc wheel. I wrote an article about this here. All in Norwegian, but there's pictures!mtbcraig said:So are these just Chris Bling (I mean King) hubs with an additional bontrager logo on them? Anybody know the difference between these and regular CK?