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Q Factor - How important is it on a bike fit?

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Q Factor - How important is it on a bike fit?

Old 09-01-05, 07:01 AM
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Corsaire
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Q Factor - How important is it on a bike fit?

While most men are narrow at the hip (by the hip flexors) I'm a bit wider there than most.

The Q factor reads that the angle the hip and the femur forms must fall within 10 - 20 degrees, the closer
to the lower number the better, mine for the reasons above leans towards the higher number. To have a wider hip is like trying: "to hit a nail on the head by hammering on it from the side" when pedaling, it was explained on this book, to give an idea.

So, I've resorted to put a washer on each pedal right between the spindle and the crank-arm. I've just have ridden 20 miles this way, felt alright, but I'm gonna try longer distances to see if I notice any improvements.

has anybody out there paid attention to this Q factor, or is it just tech hype?

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Old 09-01-05, 07:07 AM
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Hi,
it's not hype, but it's not cut and dried, either.
What is ideal depends not only on how wide your hips are, but also
if your are bowlegged (or the opposite).

Now, tell us about your yourself. You got wide hips (I do)?
Bow legged? Do you wear your shoes out more on one edge than the other?
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Old 09-01-05, 07:37 AM
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I'm not bow legged, even though some people (women usually, and... you know what women say about "bowlegged men") have thought so when I was wearing rather loose pants.
I just have wider hips than a normal for a man, my shoes wear a bit more on the outer side of the heel, yes. I'm just 160 lbs, in shape however, my thigh muscle on that side of my flexors look big and powerful though.

I'm hopin the washer installed between the spindle and the crnak arm do anything good for me.


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Old 09-01-05, 08:56 AM
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Hi,
pretty much the same here, esp wearing the shoes on the outer edge. There is a product called Lemond LeWedge. ( http://www.lemondfitness.com/products/lewedge/ ) that goes under your cleat to compensate. The website will explain. I strongly urge you to try them and see if they help.

If that doesn't work, there are a couple pedals that have adjustable Q. They might be worth trying as well.

You see, I started out thinking I needed my feet wider apart.
I went to great lengths to do so, but it didn't work. Eventually I
realised I had to try other things, and had luck with the LeWedges.
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Old 09-01-05, 09:20 AM
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I'm with "Late" on this one. There are too many variables to consider than how wide your hips are.
"Q" angle is the angle from the axis of the upper leg and the lower leg, in other words the angle at the knee. Since we bipeds balance over one foot at a time while walking, wider hips do result in more "Q" angle. I also have a high "Q" angle but my hips aren't very wide.
It seems to me that moving the pedals outward will put even more pressure on the lateral side of the knees. This is why I ride short spindle pedals (Speedplay X1's) and my knees seem to do better on these.
YMMV.

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