hookooekoo
Senior Retro Guru
If you already know what kind of gearing you use on another bike, then it's easier to find the optimum setup for this bike.Not sure what my regular cadence is but I’m pretty sure I can pedal faster than 90rpm especially down hill.
Here’s a screen grab from Strava, I maxed out downhill at just over 23mph, whereas on my geared Claud I’m normally reaching 35+ on that section and averaging 15.
I think the average would have been more than 12.5mph but I had to pull over for tractors and didn’t pause my phone. View attachment 568496
I like to use Bicycle Gear Calculator, because it's very user friendly, and you can easily change the chainrings, sprockets, and cadence, and view the results as gear inches or mph. If you don't need a sprocket or chainring, just drag it to the left. If you need another sprocket or chainring, drag another one from the left.
https://www.gear-calculator.com/?GR...,24,28,9&UF=2150&TF=90&SL=2.6&UN=MPH&DV=speed
Of course your internally geared hub probably isn't on there, but that's why I made a spreadsheet, so you can compare it to what you usually use on another bike with dérailleur gears.
If you let me know your wheel and tyre size, I'll make sure the tyre circumference is correct. Then I'll try and post the spreadsheet, and you can have a play with it.