Originally Posted by
AnthonyG
No. Not really.
There is a range of crank sizes that will work for someone. I prefer just making a straight percentage calculation in a range from x 0.19 which is short to 0.216 which is quite long. If you want to ride in an aero position then shorter is better. You would have to be a freak to be able to get a good aero position with x 0.216 cranks yet apparently it works for some.
The longer the cranks, the lower the saddle. But, also the more risk of encroaching on the belly.
In general I'm happy with a bit longer cranks, but despite more leverage, the longer rotation circle means there is no free energy.