Quote Originally Posted by goldfinch View Post
The measurements you are giving do not sound like crank size measurement but frame measurements.
Yes, crank measurements are mm - ie 170 mm. They generally run 165, 170, 175 for DF bikes. It's extremely rare to hear about 145s, so I can't imagine that's what she meant.
I'm thinking frame size.
The height of the previous owner may have as much/more to do with leg and or torso length. (My SO rides a smaller bike than me, but he's 1" taller - he's all torso and I'm all leg).