Reynolds 853 air-hardened chromoly actually gains strength in the weld zone area, instead of losing it like all other welded material, allowing Reynolds to draw this tubing thinner, for a lighter, stiffer frame with outstanding "feel". Heat treated cro-moly rear stays and investment cast dropouts increase torsional stiffness by 30% Fox's new 32 chassis features increased crown/stanchion overlap & Quad tapered lower legs to optimize strength & stiffness while driving weight out Avid Juicy 5 hydraulic disc brake features Tri-align caliper positioning for easy adjustment; Power Reserve Geometry for increased power and modulation; and the most ergonoomically designed levers on the planet Shimano Deore XT Hollowtech II crankset features a hollow forging for lighter weight with integrated BB increased riigidity & pedaling efficiency Fizik Gobi saddle features the same long rail & seating platform of the famous Airone -- the extra length allowing the rider not only more pedaling position options over the bottom bracket, 299,000 yen 15",17",19"