The ultimate MTB hubs. Rides on needle bearings that are built by Chris King himself. These hubs are like jewelry for your bike. The front hub weighs only 109 grams with an oversized axle to handle the stress of suspension. The rear hub uses a Ring Drive mechanism for quick engagement and weighs only 259 grams. All of this and a 5 year warranty, make this the standard by which all others are judged.