Originally Posted by
CEBEP
Are you sure about chainring equals?
efneo website says they’re equal to:1st 1:1 28T (phisical chainring size)
2nd 1:1,43 40T (phisical chainring size)
3rd 1:1,79 50T (phisical chainring size)
This is when you use the standard 28t physical chainring. When you use a 38t physical chainring, which you can if you order it with the 130 BCD chainring adapter, you get 38 / 54 / 68t equivalent. See
https://www.efneo.com/gearbox/technical-details/
You can go even bigger than the 38t physical, but I don't think there is any need. You can't use any size between 28 and 38. It must be either 28, or 38, or bigger.