Old 02-25-19, 09:03 AM
  #5491  
Kaben
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Im not specifically bothered about the wattages being exactly the same as "real world" use, just that the wattages are all consistent with each other for any given gear inch value. Ie if i go from a 98 inch gear to a 100 inch, then its an x% increase in watts.
The thing is i am not sure if it increases linearly so thats why i wanted to see if anyone knew the maths for it ( at a constant RPM).

I think i may have been able to get what i need from https://www.bicyclegearcalculator.uk/derailleurgears.htm but i dont know how

I set gear 1 - 7 in the first table column as 11t through 17t and the three chainrings as 51,52, 53. I can repeat this until i have all of the chainring sizes i need. Results look like this:



Im guessing this should be an ok way of guesstimating the wattages needed. Above table is for 120rpm
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