Crank length and its supposed impact on road bike efficiency - can we please move beyond the outdated notion that one-size-fits-all. The idea that a single crank length is optimal for all riders, regardless of their individual biomechanics, riding style, and performance goals, is a gross oversimplification.
Given the vast range of rider heights, leg lengths, and pedaling techniques, its astonishing that the industry continues to peddle (pun intended) the notion that a 172.5mm crank is the sweet spot for everyone. Newsflash: its not.
For riders with shorter legs, longer cranks can result in a less efficient pedal stroke, increased knee angle, and reduced power output. Conversely, riders with longer legs may find that shorter cranks compromise their ability to generate torque and speed.
So, whats the real story behind crank length and its effect on road bike efficiency? Is it purely a matter of biomechanics, or are there other factors at play - such as rider position, gearing, and even tire size?
Can we please have a more nuanced discussion about the interplay between crank length, rider physiology, and bike setup, rather than perpetuating the myth that a single crank length is the key to unlocking optimal efficiency?
And while were at it, can we also acknowledge that the notion of efficiency itself is often misused and misunderstood in the context of cycling? Is it purely a matter of watts-per-kilo, or are there other factors - such as comfort, handling, and overall ride quality - that play a critical role in determining a bikes true efficiency?