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PostPosted: Sat Oct 05, 2013 8:28 am 
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Joined: Thu Dec 30, 2010 1:33 pm
Posts: 29
Shimano offer the DA 9000 pedals with a 4mm longer axle over standard.

How do you determine if a rider needs a longer axle and can it be measured before purchasing? Is there a certain pelvis width that dictates a longer axle?

I'm unclear.

Thanks


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Posted: Sat Oct 05, 2013 8:28 am 
  • 16.90 € (including 19% VAT)
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PostPosted: Sat Oct 05, 2013 12:17 pm 
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Joined: Sat Apr 24, 2010 7:31 pm
Posts: 359
I bought some as have huge quads and really like the slightly wider q.


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PostPosted: Sat Oct 05, 2013 12:51 pm 
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Joined: Sat Feb 07, 2009 5:52 am
Posts: 258
width is determined by attitude of foot on pedal (toe in/out, pronation, ankle prominence) and knee tracking requirements moreso than pelvis width (though it contributes). No simple measurement will suffice, as it is more of a dynamics issue. You'll need a proper fitting to determine if you would benefit from a wider spindle, unless you already know your pedal stroke is compromised by a narrow stance.


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PostPosted: Sat Oct 05, 2013 2:08 pm 
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I do have a tendency to bring my toe in slightly, ankle outwards plus I also have big quads too. With this in mind I'm considering a wider axle might help but wanted to see your thoughts.


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PostPosted: Sat Oct 05, 2013 2:26 pm 
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Here's my recent Retual bike fit dimensions. See knee tracing below - the test was done on a 50 mm Speedplay Ti axle with the cleats set almost to the most in position of each shoe, to improve Q-Factor.

Image


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PostPosted: Sat Oct 05, 2013 7:18 pm 
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Joined: Fri Jun 05, 2009 9:40 am
Posts: 427
Location: Switzerland
hatone wrote:
I do have a tendency to bring my toe in slightly, ankle outwards plus I also have big quads too. With this in mind I'm considering a wider axle might help but wanted to see your thoughts.


don't see how they would help you. they would only bring your ankles further out but consider the 4 mm in relation to a seat height of let's say 750 mm

i find them helpful because of too little foot/ankle clearance (wide and flat feet)


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Posted: Sat Oct 05, 2013 7:18 pm 
  • 16.90 € (including 19% VAT)
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