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Gearing efficiency

11 July, 2011 11:31AM
I'm trying to find some reliable and authoritative references related to the efficiency of bicycle chain drives, belt drives, and shaft drives; also for the efficiency of various gearing systems (mainly hub and derailleur). There seem to be lots of numbers floating around on the web without any indication of where these numbers came from. The reason for this request is that I'm trying to improve the Wikipedia article on 'Bicycle gearing', and any numbers I quote must be backed by a reliable reference.

The best references I've found so far include:

http://www.ihpva.org/HParchive/PDF/hp52-2001.pdf

http://www.ihpva.org/HParchive/PDF/hp50-2000.pdf

plus summary of above in: http://www.jhu.edu/~gazette/1999/aug3099/30pedal.html

Some bicycle suppliers make certain efficiency claims (without any indication of where the numbers came from):

http://www.dynamicbicycles.com/chainless/commonquestions.php

Can anyone provide any good references. Efficiency of chain drive for a single-speed bicycle would be particularly helpful as a standard against which to compare other systems.

- Murray
Subject Author Posted

Gearing efficiency

Murray R Langton 11 July, 2011 11:31AM

Re: Gearing efficiency

DocB 11 July, 2011 12:11PM

Re: Gearing efficiency

cotterpin 12 July, 2011 12:38PM

Re: Gearing efficiency

Murray R Langton 12 July, 2011 04:47PM

Re: Gearing efficiency

cotterpin 12 July, 2011 07:39PM

Re: Gearing efficiency

Murray R Langton 13 July, 2011 02:03PM



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