The King ISO Disc hub reproduces the proven strength of the King Classic hub in a disc brake version. Use of larger bar stock in the production of the ISO SD Front Disc hub shell increases the diameter significantly to spread spoke holes away from each other. Shorter spokes may be used to build a more durable, stiffer and stronger wheel. Compatible with all 6-bolt ISO disc rotors. Manufactured in Portland, Oregon USA. 5-year warranty.