How crank length influences comfort on multi-hour Zone 2 rides seems to be a topic of ongoing debate, with some swearing by the traditional 172.5mm or 175mm lengths, while others claim that shorter or longer cranks can provide a more comfortable riding experience.
What if we challenge the conventional wisdom that one crank length fits all, or rather, one crank length fits a specific height range? Is it possible that the optimal crank length for comfort on long Zone 2 rides is actually more dependent on individual factors such as pedaling style, flexibility, and muscle composition, rather than just height or leg length?
For example, a rider with a more aggressive pedaling style may find that a shorter crank length allows for a more efficient and comfortable spin, while a rider with a more laid-back style may prefer a longer crank length to reduce fatigue. Similarly, a rider with tight hip flexors or limited ankle mobility may find that a shorter crank length reduces strain on these areas, while a rider with more flexible hips and ankles may be able to handle a longer crank length with ease.
Are there any studies or data that support the idea that crank length should be tailored to individual factors, rather than just height or leg length? And if so, how can riders determine their optimal crank length for comfort on long Zone 2 rides?