Position on the bike / bikefitting

@stu you are not alone, I also find hard to get an exact number. I get 40-41, I think the ideal for me is 40, with the STIs angled slight inward, seems very natural. Bikes for my size usually comes with 44.

Also not alone in the flat bars, I have a MTB that I pushed everything as as close as possible to the center, but still far from what I would like, because the handlebar gets thicker and the brakes and shifter can't slide anymore. I see people using MTBs in the city with really wide handlebars, and seems weird how they pedal, and also look like a parachute, slowing them down.

The only way I can stand flat bars is with bar-ends, simulating a STI, which I spend 80% or more of the time. I also thought a lot about putting the bar-ends inboard, but never did.

My first bike was a 26" MTB, I installed bar-ends because I though they looked cool, but I wanted to use them all the time. I even angled my brakes up, so I could reach them with my thumbs, while in the bar-ends. After using a STI for the first time, being able to brake and shift in that position, everything made sense.

I think the hands in the vertical position makes way more sense, the same deal with vertical mice and the bones in the forearm crossing. But unfortunately you get more precision with them in the horizontal.