Originally Posted by
JohnDThompson
When I was with Trek, we did some hardness testing of various chainrings. I don't remember the numbers, but Campagnolo and Stronglight were the hardest, and pretty close to each other, Sakae Ringyo, Sugino and Shimano were softer and pretty close to each other, and TA was the softest.
That is my recollection of the Rockwell hardness tests that i saw. We were a Trek dealer but also a big Peugeot dealer and stocked stronglight cranks.