Chris King ISO Front MTB Hub: The Chris King (CK) ISO front hub is compatible with 6 bolt disc rotors & is 100/110mm front spacing with either QR or 15mm/20mm axle. Months of design & 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 & 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 complete confidence & back that up for 5 full years. One piece axle 100/110mm axle width Available in 9 colour options (QR & 15mm only) ISO 6 bolt disc fitting Attatchment option: QR, 15/20mm bolt thru Available spoke hole drillings: 32h