It was one of the quickest cable routing in the history, honestly. It's quite easy, as the stem and the bar are two elements. You can firstly go through the first element, and then through the handlebar. The channel from the rear brake is also a standard one, the frameset are very well made, no sharp edges, all is great so I can say that without a watch it took me around 90 minutes to assembly the whole bike. I was rather not in a rush
Have a look on the manual I had attached, it's really helpful.
