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Q Factor

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Old 09-22-03, 02:07 PM
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ORBIT 1
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Q Factor

What is a good Q factor.?
On my Mercian Audax bike,the distance between the inside face of the cranks is 150mm.Is this excessive?
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Old 09-22-03, 07:10 PM
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Hi,
that is kinda like asking what a good shoe size is. Depends on your hips. If it's too narrow, you can run into trouble. Personally, I like it wide, so I would kick up a fuss. A small Q was traditionally considered a good thing. But having suffered on a bike like that; I came to disagree. I see it as part of the fit of the bike.
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Old 09-23-03, 01:44 AM
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Small Q was the secret of Greame Obree's hr record bikie (the steel Superman position one.) It can greaty improve aerodynamics. The comfort part is a matter of hip width. Most modern cranks tend to be on the wide side.
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Old 09-23-03, 10:06 AM
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Originally posted by MichaelW
...It can greaty improve aerodynamics. The comfort part is a matter of hip width...
I think a correct "Q factor" setup goes a long ways in preventing knee pain/injuries as well.

Now that I think of it, I may need to readdress my cleat adjustments since I have changed from a triple crank setup to a double. :confused:
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Old 09-23-03, 10:54 AM
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Generally speaking, compared to road bikes, MTBs have wider Q factors. I guess it all depends on crank design. You can't simply install a different length spindle in hopes of altering your Q factor......then your chainline will be screwed.
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Old 09-24-03, 06:53 AM
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the smaller Q-factor is a reason why the campy camp loves their stuff over shimano. the campy cranks have a narrower...what would you call it...gap? space?
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Old 09-24-03, 08:54 AM
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Q, the gap is called the Q.
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