Here's the gearing on the Sram cassette 10-12-14-16-18-21-24-28-32-36-42-50 
Unless you have a Really Small single  chainring, the steps would make this 
single-ring drivetrain less than versatile.  
Here's a mechanically simpler and more versatile compact double that for 
all practical purposes functions like a 1x drivetrain  (ok, functions like 
two 1x drivetrains)
http://home.earthlink.net/~mike.sherman/shift.html?R0=25&R1=42&R2=999&C0=12&C1=13&C2=14&C3=15&C4=16&C5=18&C6=21&C7=24&C8=29&C9=999&C10=999&CAS=0&WI=8&CR=170&RT=1&ST=0&RPM=90&SRT=0&lRPM=80&hRMP=100&G=show&S=yes&TITLE=&HL=1

On Friday, March 25, 2016 at 12:32:22 PM UTC-5, BSWP wrote:
>
> Makes the Rohloff IGH all the more attractive, in my opinion.
>
> - Andrew, Berkeley
>

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