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7/6/2025, 4:03:45 AM
>>2047484
This is literally something I have alluded to. I have also gone on to explain that for every chainwheel there is onr or two cogs for which the chainline is perfect or close to that. But still, for some unknown reasons dimwits will never get this: At any sort of decent speed, like your 1 hr max, aerodynamic drag makes for 90% of all resistance. Rolling will make the rest. Drivetrain efficiency, being thought of as efficiency and not drag of course, is a factor that needs application to the total power of course. So at say 200 watts the difference, as indicated by
>picrel
would be a staggering 2 Watts! Wow I hope you shaved your legs.
But the point I was making still is just as valid:
Say you have a 48 - 17 fixie (or ss...) and you compare it to a derailleur equipped bike. You could put the 48 - 17 ratio exactly where your neutral chainline is. At that very ratio both bikes would be effectively the same (again: Save for the even less relevant jokey losses) and only once you shifted the deraileur bike would be less efficient but once conditions force that shift the guy on the single speed is physiologically far less efficient.
This is literally something I have alluded to. I have also gone on to explain that for every chainwheel there is onr or two cogs for which the chainline is perfect or close to that. But still, for some unknown reasons dimwits will never get this: At any sort of decent speed, like your 1 hr max, aerodynamic drag makes for 90% of all resistance. Rolling will make the rest. Drivetrain efficiency, being thought of as efficiency and not drag of course, is a factor that needs application to the total power of course. So at say 200 watts the difference, as indicated by
>picrel
would be a staggering 2 Watts! Wow I hope you shaved your legs.
But the point I was making still is just as valid:
Say you have a 48 - 17 fixie (or ss...) and you compare it to a derailleur equipped bike. You could put the 48 - 17 ratio exactly where your neutral chainline is. At that very ratio both bikes would be effectively the same (again: Save for the even less relevant jokey losses) and only once you shifted the deraileur bike would be less efficient but once conditions force that shift the guy on the single speed is physiologically far less efficient.
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