How much testing has been done on the new cranks? September 26, 2017 15:59 Updated A lot. We started development of the new cranks before Eagle™ itself was started. Related articles Why does Eagle™ have a larger range? I was completely fine with what I had. Why 12-speed? Couldn’t you make a wider-range 11-speed? Since the new Eagle™ cranks are lighter, have they lost any strength or stiffness? Isn’t the narrower Eagle™ chain weaker? Will you make an additional cassette ratio besides 10-50?