How are aero bars measured?

Triathlon Forum
1

I see Vision Tech aero bars come in 230, 250, 270 and 290 mm. How is this measurement done?

I would guess that it is not the actual length with the curve but rather the straight line length. Hard to explain.

2

its on their website

diagrams and everything
.

3

Probably should have started there:) Perfect and exactly what I was looking for.