Do you have the right crank size? (and how will my position change if I swap?)
Lets talk about crank length, specifically how does it affect bike fit and position? Is it worth considering a change of crank size? How much of a change is significant? We also conduct a frankencrank experiment with asymmetrical cranks. Crank Fit Science!
Additional Use Case Sharing:
- I changed from 170mm to 165mm and agjusted fit according and my hot knees and sore lower back disappeared. When i built my bike i asked for 165 but shop said no you need 170 woodnt go any smaller than that after 2 yrs i bought a cheap sora 165 crankset and put it on as a trail and just raised seat by 2.5 mm and even by doing that i felt better. Im 5ft 6″ Power, position and comfort all greatly improved. Great video as always
- I feel like my shorter 170 crank spins faster on the flats , but stalls out way more on hills , my longer cranks spin way better up hills , and do just as well on flats but maybe slightly worse .
- In my experience going from 170 to 175, or vice versa ‘feels’ like two whole gear ratios.I know that the gear ratios make up for the mechanical advantage between what I feel at the pedal, and what reaches the tire. but there’s just something about having the mechanical advantage of the lever attached to the pedal that makes it easier to move the machine.
Source : FastFitnessTips: Cycling Science!