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a shoe shim question(6 posts)

a shoe shim questionkcd
Feb 28, 2002 6:48 PM
I went to a bike fitter to see about putting shims under my right shoe because of a knee problem. Most of the pressure seems to be on the outside of the foot when I pedal--this I understand is typical. The fitter stated that the thicker part of the shim should be under the outside of the foot so as to rotate the foot to its desired position. Is this correct? It seems to me, based on a limited research into the area, that the thicker part of the shim should be under the inside of the foot to accomodate my tendency to put the pressure on the outside.
re: a shoe shim questionyummy
Mar 1, 2002 4:18 AM
Your theory is the correct one. If you put pressure on the outside of your foot with a tendecy to roll inward, the thicker part of the shim needs to go on the inside in order to stabilize the roll. This will give your foot a natural platform and will stop the rolling thus giving you a healthier and more powerful pedalstroke.

If you reversed it...you would be forcing your foot in a direction it doesn't want to go in the first place. Not a good thing.

If you get a chance, try using these shims in conjunction with a pair of Superfeet insoles. I think you'll like the results. Good luck.
I say your fitter is rightMisJG
Mar 1, 2002 7:14 AM
If your foot is rolling to the outside and you put the thicker part of the shim on the inside, it will magnify the outward roll. Putting the thicker part of the shim on the outside will correct the outside roll and put more even pressure on the pedal surface.
re: a shoe shim questionkcd
Mar 2, 2002 12:24 AM
I decided to go with the information on http://www.bicyclefit.com/forefoot.htm for Forefoot Varus and put the thicker part of the shim on the inside part of the right foot.
re: a shoe shim questionyummy
Mar 2, 2002 7:32 AM
Right on. MisJG...kcd said that the pressure was on the outside of his foot, not that he was rolling his foot to the outside. Pressure on the outside means that this is where the contact point is. Therfore leaving a gap between the inside of the foot and the pedal. This is where the wide part of the shim comes into play...it fills in this gap creating a solid platform.
re: a shoe shim questionkcd
Mar 2, 2002 4:06 PM
You are right--my right foot is rolling to the inside, so I think we all agree. Thanks for the help.