Subject is a real person.
I have paper in front of me that suggests that inseam between 30,7-33,0 inch takes 170 and inseam between 31,8-34,2 inch takes 172,5 cranks. Now these suggestions are overlapping and thats's what I'm wondering here.
Started wondering it also, because some complete bike setups i looked lately, suggest already 172,5 crank in sizes suitable for this subject.
As it's about time to start next training season, timing for crank size change would be perfect now IMHO as there's plenty of time to teach legs and muscles to different circles/angles without problems aso. I've heard some stories how people have run into knee problems, when doing shoe/crank changes in the middle of tough training season.