I'm short (160cm), and toe overlap is an issue for me. I have about 2.5-3.5cm of overlap on my two road bikes (i.e. the front of my shoe is in line with the inner edge of the brake track in the worst scenario position of crank and wheel turning).
I should probably be on 165mm cranks too, but my bikes all came with 170mm cranks.
Yes you should use 165mm cranks.
Agreed, if you even care about pro's fitting then there are plenty of examples
165mm is the right size for people around 5'6-5'7 (167-170cm).
Christ Froome, 185/172.5 = 1.07 (normal-short crank length to his height)
Bradley Wiggins, 190/177.5 = 1.07 (normal-short crank length to his height)
Peter Sagan, 184/172.5 = 1.07 (normal-short crank length to his height)
Adam Hansens, 185/180.0 = 1.02 (normal-long crank length to his height)
And here we are, 170cm rider with 165mm crank length get =1.03 pretty close to Adam Hansens that people says it's pretty long crank length to the height already.
160cm rider using 170mm crank length make it to whopping 0.94 ratio. it's like people around 185cm height using crank length=196mm, sound so wrong isn't it?
to get to normal-short ratio (1.07) then 170cm rider would use 158mm crank length.
And 160cm rider would use 149mm crank length...
ps. this is simplified estimation using just the height and crank length. Actual leg bone length will get to a much closer estimation, but the data are hard to find. This is just enough to make a point that slowK is using super long crank!