I finally listened to the podcast on crank length that Bio_McGeek posted a few weeks back. Great information and timely for me. I'm taking this winter to try and fix a problem that has me pondering some questions.
For years I have had a right knee problem that with the help of a PT (my wife) we have come up with a diagnosis. Basically, my biceps femoris tendon is snapping over the fibular head. When I pedal or squat, as I extend my leg the tendon snaps back in place. I don't currently have pain from it but I have in the past. It happens under load or not so imagine wha it's like at 95RPM on a ride.
I conclude I need to minimize knee flexion at the top of the pedal stroke. The question is how?
Given a set saddle height and set back, can frame size or geometry affect knee flexion? I know shorter cranks will change things for the better but don't know enough about the geometry of frames.
I'm 5'9, 165lbs, and have a saddle hight of 71cm. I ride a Cervelo S1 in 51cm with 170mm cranks and like it. I'm open to a different bike but if a simple swap to shorter cranks could resolve the problem, great.
For years I have had a right knee problem that with the help of a PT (my wife) we have come up with a diagnosis. Basically, my biceps femoris tendon is snapping over the fibular head. When I pedal or squat, as I extend my leg the tendon snaps back in place. I don't currently have pain from it but I have in the past. It happens under load or not so imagine wha it's like at 95RPM on a ride.
I conclude I need to minimize knee flexion at the top of the pedal stroke. The question is how?
Given a set saddle height and set back, can frame size or geometry affect knee flexion? I know shorter cranks will change things for the better but don't know enough about the geometry of frames.
I'm 5'9, 165lbs, and have a saddle hight of 71cm. I ride a Cervelo S1 in 51cm with 170mm cranks and like it. I'm open to a different bike but if a simple swap to shorter cranks could resolve the problem, great.