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PostPosted: Mon May 23, 2016 3:58 pm 
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Joined: Wed Jan 22, 2014 11:48 am
Posts: 1400
Depends on where you measure.

Higher or lower compared to what?


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PostPosted: Mon May 23, 2016 9:44 pm 
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Joined: Wed Sep 25, 2013 8:11 pm
Posts: 2
Drivetrain efficiency of a modern bicycle (i.e. derailleur system with typical road gear range) peaks at about 98% in optimal conditions however variations of as much as 5% (down to 93%) are possible at realistic power outputs.

http://www.cyclingpowerlab.com/Drivetra ... iency.aspx


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PostPosted: Mon May 23, 2016 10:02 pm 
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Joined: Tue Apr 12, 2011 8:08 am
Posts: 2275
Location: Pedal Square
bikes4ever wrote:
Does anyone one what drivetrain friction will do to power output? Would it show higher averages or lower?

Depends?
Measure at the crank ... shows higher than you put on the road.
Measure at the rear hub ... shows lower than you produce.

_________________
Bikes: Raw Ti, 650b flatbar CX


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