Originally Posted by
CaptainHaddock
So on the topic of captain crank length, how does the combination of shorter captain with longer stoker work? If I'm thinking this through correctly, since they will both have the same size timing ring that at the center point, they rotate at the same speed, but at the crank end / peddle we'll have two differing rotational speeds / cadences. Is this correct? if so, what will be the issues?
thanks!
You are correct that both cranks must turn at the same speed since they are connected by the same size timing rings. The term cadence is generally used to describe the rpm of the timing ring or crank so the cadence must be the same for both the captain and stoker.
Crank length should be determined primarily by the comfort of the rider. Taller riders generally like longer cranks than shorter people but it is a personal decision. Flexibility and coordination can play a role as well as the leg length of the rider.
Small variation can be made to the preferred crank length to help the stoker and captain agree on a cadence. If one rider likes a faster cadence then lengthening their crank will tend to slow them down. Likewise if a rider likes a slow cadence then a shorter crank will tend to help them spin faster.
General information on crank length can be found at:
http://sheldonbrown.com/cranks.html