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Old 10-15-10, 10:29 PM
  #18  
vol
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Originally Posted by dougmc
Not in any significant degree if all other factors are equal.
Thanks. Beside the weakness of the frame, what about pedaling efficiency? This article seems to suggest the step-through is not as efficient as horizontal top tube:

"it’s an innately weak and inefficient design compared to the classic diamond frame, because of the way the top tube joins the seat tube far below the seat stays. It’s inherently ’floppy’ by comparison and, other things being equal, requires greater effort from the rider for the same speed."

I can understand the frame weakness due to the lower top bar, but why and how does it affect pedaling efficient/effort?
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