What specific effects do varying crank lengths have on a riders leverage and body position, and how do these effects impact overall efficiency and comfort, particularly in relation to different types of terrain and riding styles.
For instance, does a shorter crank length provide better leverage for riders with shorter legs, or does it simply result in a less efficient pedaling motion. Conversely, do longer crank lengths offer more power and speed for taller riders, or do they compromise comfort and control.
Additionally, how do different crank lengths influence a riders body position on the bike, including factors such as seat height, handlebar height, and overall posture. Are there any general guidelines or recommendations for crank length based on rider height, leg length, or other physical characteristics.