Do ya'll think the VB-R-186 will be comfy enough for endurance rides? Weekly 50 milers? I'm not very aware on what makes a frame more comfortable. Aspects like changing the seat to handlebar angle seem to be applicable to all frames.
If you have a 27.2mm seatpost(that flexes more).
28 or 30mm tubeless tires, inflated at 4/5bars depending on your weight.
Put some spacers below the stem, or turn the stem up for a more upward position.
And a tick comfy guidoline.
All this make a big comfort difference on any frame.