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Femur length discrepancy

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Femur length discrepancy

Old 05-27-15, 12:57 PM
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Femur length discrepancy

I have about a 2cm discrepancy in the length of my femurs. I was thinking of offsetting the angle of the saddle to bring the shorter knee forward. Is this a good or bad idea? I'm aware that adjusting the cleats fore and aft position is a possibility but I find having the cleat away from the ball of the foot quite uncomfortable.

thanks,
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Old 06-25-15, 10:09 PM
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interesting. thanks for posting. I look forward to seeing some answers...
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Old 06-26-15, 11:34 AM
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Sports Orthopedics MD may give you firm Numbers , a more expert analysis,

the shoe thickness, pedal height, and crank arm differential side to side is all ways to compensate.

Perhaps thicker shoe sole on the short leg + a shorter crank arm ?

Last edited by fietsbob; 06-26-15 at 11:38 AM.
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Old 06-26-15, 12:00 PM
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One of my legs is a little longer than the other, I'm not really sure where. Angling the nose of the saddle helped, but adjusting my cleats (or strap length on the Power Grips) did much more to make my legs happy. It may not take as much cleat adjustment as you're picturing, and moving the cleat for the longer leg backward shouldn't cause pain.
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Old 06-26-15, 12:31 PM
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I have a 12mm discrepancy right to left. My PT diagnosed it first visit last February (at 61 years old!). She gave me 12mm heel lifts. I made 1/4" shims from aluminum plate for my cycling shoes. And raised my bike seats 1/8". Wow! For the first time in my life, I could look down through the plane of the frame and wheels!

I haven't measured, but I think my difference is roughly 6 mm thigh, 6 mm calf. My thought for 2 cms of thigh would be to go with a 1 cm shim between your cleat and shoe and move that cleat back a cm and your seat back 1/2 cm (and bars back 1/2 cm or the stem up 1/4 cm).

I used to ride with my seat twisted so the nose was ~5mm to the left. Now I have it about 2mm to the left. (A little off center helps me with soft tissue there.) Everything about the bike feels more symmetrical and more "right" since I added that shim.

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