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A thorough analysis of RC5 sole stiffness and comparison with RC9 and RC7 reveals important differences that could not be seen only by the difference in stiffness index...!
Good-bye to the unfamiliar "shoe stiffness index”.
From now on, let's determine it objectively by the numbers.
This channel is brought to you by "Doc Tak" from Taki town near Ise grand shrine in Mie prefecture, Japan.
Who am I
Tak Nishii Ph.D. (Sport science, Kansei Engineering)
Head coach of Japan MTB team @ Beijing Olympics (2008)
Head coach of Japan cycling team @ Youth Olympics (2010 and 2014)
Collaborative study with Shimano for more than 10 years