Colnago a1 r road bike 105the aluminium frame on this a1 r road bike from colnago reaches a higher performance level every feature on the bike has been thoroughly studied and designed in accordance with the legendary colnago criteria speed fluidity stability and lightness are in its dna the aesthetics are enhanced through the use of cutting edge construction and welding technologies particular attention is placed on the orientation of tube junctions to ensure maximum torsional rigidity w