Originally Posted by
Kontact
You aren't going to find "endurance bikes" with relaxed seat tube angles for a different position. No one is selling that fit philosophy in the endurance market. That's a rando thing.
Yep, the Orbea has a 73.5-degree seattube angle and so does the Colnago.
Often a shorter toptube is used in lieu of any relaxing of the seattube angle, which has the exact same effect on reach and with the only overall difference perhaps being what style (zero or offset) of seatpost that the rider ends up selecting or that the bike comes with.
So the only obvious difference between the Orbea Orca and the Colnago CX-Zero would seem to be the headtube length.
But, since this Colnago in this particular "52s" frame size is generally considered to be the same fit as their standard (vs. compact) 56cm frame, it's 55.5cm TT is rather short for a 56cm frame. The Orbea (a Pro Tour racing bike) is a 55cm frame with same angles and same 55.5cm toptube length.