An update. The bike arrived from Bikes Direct yesterday. It is still in its box. I called Avianca to get some more clarity on their web site policy which clearly states that bicycles fly free but the handle bars must be folded and the pedals loose. That's all it says
Sports equipment | Avianca
What the web site DOESN'T say is that the bicycle must be in a box and the box can't exceed 90 inches total of all 3 dimensions. No one could possibly know this without calling them, which I should have done first obviously.
The box that the Fat Bike came in totals 101" which will cost $140.00 AND go on a separate cargo flight that I will have to track down independently from my current flight.
The only option looks like trying cut the box down to size but (I haven't opened it yet) it's hard to imagine the factory not packing it tightly.
So just a heads up to those who think a web site gives all the information or that stated policy is actual policy.
I'll update this post in case anyone is interested.