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#7112
Sensei
Participant

Oh inquisitive grasshopper:

After several years at our Sensei fly fishing school we found if one regards the changes of the frictional forces during the first several centimeters of slide on a horizontal rock as transitions from static to dynamic conditions, the relatively constant coefficient finally reached is the coefficient of dynamic friction for that particular speed. Likewise the nearly constant speed which is attained after the first several centimeters of motion down the inclined rock represents the equilibrium speed for that particular angle of incline.

But I digress. In non-sensei terms, first it is not steel that is needed but aluminum. Think of an aluminum canoe that you are taking over a shoal or rocky riffle. The aluminum canoe grabs and holds tight to the rocks below and you have to “pull” your stuck canoe to deeper waters. So is it with aluminum cleats. They grab the rocks as you walk on the bottom, like tiny little ninja hands working for you. Rock Treads are aluminum disks that hold tight to your boots and to the river bottom.