At the pinnacle of the XC game resides Specialized's S-Works Stumpjumper 29er Frameset. The S-Works FACT-carbon frame absolutely flies uphill and boasts race-proven geometry for the trip back down. Up front, a 90mm-travel SID WC fork dismantles techy trails and features Brain technology for premium efficiency on smooth and rowdy sections alike. Key frame details include a PF30 BB, a tapered head tube, internal cable routing and a 142+ rear end. Is this one of the fastest frames on Earth? Specialized Factory riders think so, and they back it up by winning. A lot.