Since the teeth don't appear to be side chamfered, I am guessing that 1114 or one of their sponsors custom cut those, probably on a water jet or plasma cutter. (I have been experimenting with custom cutting steel sprockets on a laser table, to obtain precise shaft fit features such as the double-d found on the Globe shaft.)
Back on topic: this is a great drive train study and very useful info for any of us who are considering the new IFI wheels.
Thanks and props to 1114!
__________________
Richard Wallace
Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
since 2003
I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)