The daddy - Mosso's flagship frame is hard to set apart from the top big-brand (and big-price!) DH frames.  Featuring a genuine FSR 4-bar linkage, the link plate allows for multiple geometry settings and travel adjustments up to 8 inches!  Construction is bombproof, with a stiff monocoque front, ring-reinforced head tube, CNC'd yokes/dropouts, and sealed cartridge bearings at all pivots.  For disc brakes only.

This version of the 666 shares its sturdy monocoque front and CNC'd yokes with the DH2, and features an alternative rear end for those who like horizontal dropouts and the limited amount of wheelbase adjustment they offer.  As an indication of the quality of the 666, this rear end is identical to the Azonic Eliminator/Coyote DH3, which are more expensive and lack the monocoque front!