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Advice re Shoe/Cleat allignment and Q Factor
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21-11-2009 6:40pm#1Having had a recent bike fit I was advised to decrease my Q Factor as and I quote from my analysis
One thing I did notice after you left the clinic was the width of your stance base . Ideally the knee should sit on a vertical line from hip to the ankle/ foot which on assessment of the diagonal motion of the left knee appears not to be the case. Figure 6 below shows that the knee and the ankle are lateral to a vertical line dropped from the approximate position of the hip. This means that the stance base is too wide i.e. the feet are too far apart. This again will place strain on the knees. I would suggest that you shift the cleats 5mm each to the outside of the shoes to narrow the stance base.
The problem is that I have my cleat pushed to the max ( Look Keo Red) and the limiting factor is the position of holes on my shoes ( Decathlon Brand which I have been very happy with for past few years). I am looking for suggestions as to what shoes alllow for a greater lateral movement of the cleat as I need to move the cleat more towards the outside as referenced above. I know Time pedals have a reversible cleat which allows for this but have tried their pedals and not happy with the float. Maybe there are adaptors for Look cleats etc but any advice welcome. I have posted (poor) photo of my shoe and some other examples below.0
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Thanks victorcarrera, yes it is an approximation and yes the other leg is exactly the same. No it doesn't matter when you are out of the saddle but on a long spin this accounts for a very small percentage of the cycle. I should add that my bike fit was due to chronic right knee problem that arose last June. This was surprising as I have been cycling for over 20 years with no problem. Came to the conclusion that it was a result of a crash last spring when I damaged my tensor fascia latae muscle and gluteus medius (side of hip) Very sore at time but trained through and problem only arose about 6/8 weeks later. The weakened muscles which play a major role in keeping your hips in line caused my right leg to track incorrectly and hence the patella was not tracking in the groove etc etc resulting in knee pain
. The analysis showed this to be the case so have been working on the suggestions to correct the weakened muscles etc. The Q factor however is not the main reason for my knee problem however the biomechanics suggest it might take some strain from my knees which were always my weak point on the bike! Sorry for being so long winded but it shows how a simple problem can lead to major complications and it might help prevent somebody from having similar problems.
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