aluminum tubing; shaped Tecnos-style top and down tube. Later incarnation added the HP carbon rear stays. Active—(2004-2005) Columbus Altec2 aluminum teardrop shape tubing with carbon B-stay and carbon fork, Italian threaded bottom bracket Active Plus—(2006-) Colnago Mix—(2004-2006?) Aluminum with oversize aluminum chain stays and carbon fiber seat stays; Master shaped top tube and a Dream shaped down tube. Rapid—Tig welded oversize proprietary Columbus "Custom" 7003 aluminum alloy tubing Titanium Master Titan—Welded 6AL/4V titanium alloy tubing with profiled top tube and down tubes Oval Titan—oversized ovalized top and down tube welded titanium Bi-Titan—Welded dual titanium down tube Titanio—(mid-1990s) Single downtube standard profile (1"), all titanium welded frame, steel fork CT-1--Welded titanium main tubes, monostay rear with bonded carbon fiber stays, 1" carbon fork CT-2--Like CT-1, but with HP stays and 1.125 carbon fork Carbon Volo—(1988) Carbon fiber reinforced with Kevlar monocoque frame C35—(1989) Full carbon monocoque frame. Carbitubo—(1988-1991) Shipped as a single ‘mono’ carbon downtube tubes bonded with aluminum lugs, later a double downtube was tried. Produced in conjunction with Alan. See pictures here. C40—(1993/4-) Full carbon first shipped with Precisa steel fork, later with carbon fork. First generation shipped with round tubes; later with Master profile carbon tubes bonded to carbon lugs. CF1—(2000) Colnago-Ferrari collaboration, Carbon monocoque. Several iterations of the Ferrari CF frames followed. Cristallo (2004). An all-carbon monocoque frame weighing 1,100g which is rare in production and information. C50—(2004) Similar construction to C40 with 1.125 fork. C50 CX Limited edition, special version built for cyclocross, with cantilever brake bosses front/rear. Prestige CX Monocoque (lugless) carbon frame for cyclocross, first version had canti bosses, second version has disc brake fittings. Extreme C—(2006) Lightweight full carbon climbing bike, carbon lug and round carbon tube construction with shorter lugs. Extreme Power—(2007) Similar construction to C40/C50 but stiffer construction also using round carbon tubes. CX1—(2007) Carbon monocoque front end bonded to carbon stays. It is also the first Colnago to feature an integrated headset CLX—(2008) Carbon monocoque; rear triangle is molded separately from the front, and attached via bonded lugs EPS—(2009) Lug and tube construction with integrated headset and new fork design EPQ— (2011) Redone Extreme Power (EP) tube and lug construction with more square profile rear stays ('Q-Stay') that adds stiffness, shared with the M10 and C59. Semi-integrated headset. C59—(2011) Carbon tube and lug bonded frame like C40/C50 (2011) with profiled tubes similar to the Master. M10—(2011) Monocoque construction with similar