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Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Triple or Compact?

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Old 02-20-05 | 08:04 PM
  #76  
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From: Might as well be underwater because I make less drag than a torpedoE (no aero bars here though)
Originally Posted by terrymorse
Data on the subject is pretty hard to find, but here's a chart I pulled from a Human Power journal:



Spicer et al, On the efficiency of bicycle chain drives;
Human Power, the Journal of the IHPVA; Number 50, Spring 2000

Here's a link to the PDF containing the chart.
That is pretty interesting stuff. I would have never imagined a 2% difference between a 52-11 and 52-15 at the same power output. But then it gets me wondering how small the difference would be between the 11T and 12T....maybe .5%. Who knows?
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Old 02-20-05 | 10:11 PM
  #77  
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From: Newark, CA. San Francisco Bay Area
Originally Posted by Brett 12
That is for double front derailleur. We are talking about triples.

Besides that 15 tooth limit on double front derailleurs gets broken all the time whenever a compact crank is installed...no problems either.
Yeah, I went back and saw the triple limit is listed as 22 teeth. I guess as long as the end of the cage doesn't rub, a 28 tooth granny would work. My knees have not been feeling that great lately.
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Old 02-26-05 | 12:37 AM
  #78  
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Bikes: LOOK 555, SPECIALIZED

Thanks for the Help. Heres the Pics. After my first ride--It's fast and wants to climb-Didn't use granny Might be that this bike is peppy enough that I could have gone a double. I have a century next week, we will see. The best thing so far is the soft ride of the carbon vs my old Aluminum.
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