You have a choice of fork changes to add disc brakes, suspension fork, carbon fork with disc tabs and a steel fork with disc tabs. They are all available for mountain bikes. For the rear it's expensive, but Specialized (and another bike maker, but I can't remember which one) used to sell an adapter made by Therapy Components. Because Specialized recommended this as the only suitable adapter I did buy one for a bike that I was adding disc brakes. It's sort of custom made, easy to install and worked well. The company needs to know the rear hub you'll be using. Their web site is http://www.therapycomponents.com/conversion.htm. Reviews are at http://www.mtbr.com/reviews/disc_bra...ct_20529.shtml.