Originally Posted by
camhabib
I was told this once back in the day, whether or not it's still true I don't know:
If you're between sizes, go smaller. It's lighter and stiffer.
And, you have more option to "increase" the frame size through stems, different reach bars, seat setback, etc. However, it's hard to "decrease' the frame size with anything other than a hacksaw. Nobody likes being forced into a 70mm stem.