Months of design and testing went into the ISO hubset. During the development process, CK adapted their machines to use larger bar stock when they make the hub shells. This manufacturing improvement allowed them to increase the spoke flange diameter significantly. A larger spoke flange spreads the spoke holes away from each other. Also, you can use shorter spokes to build a more durable, stiffer and stronger wheel. Like all of CK other hubs, these carry a 5 year warranty. It is easy to make a really light hub, not so easy to make one that you can sell with confidence and back that up for 5 full years….