Originally Posted by
camashtorcal
No one on this forum can tell you what it best for you in terms of fit. Try a competent bike shop and get fitted. There are 5 foot folks that ride all different lengths of cranks. If you need a starting point most people ride 165mm cranks but is that best for you.... who knows? For people whose hobby is to ride a bike, it's so ironic to me that they won't just go for a ride to a bike shop and ask the people whose job it is to answer these questions.
"Most" people ride 170mm cranks. They come standard on almost every single bike you can buy as a complete. For your height 165mm is probably more appropriate. Check actual recommended fit though based on your inseam. 162.5mm could actually work best