Hmmm... interesting reading...

My first bike had 175 cranks.
Then I got a smaller frame/bike (Giant) and it had 170 cranks. That is the bike I raced on.

Then we bought another race bike for me - also with 170 cranks on - and a women specific frame (EMC2) and turned my Giant into a time trial specific bike.

I have just reverted to 175 cranks on my time trial bike (Giant) to hopefully help my speed...

I have enjoyed reading this. Thank you for starting it.