When the riders at Syncros wanted a fast easy way to remove and install their cranks, the suggestion of Shimano's One Key Release came to mind. Shimano doesn't make their One Key Release anymore, so they thought about how they could improve the idea and make their own. The Crank-O-Matic set is the result, made of aluminum and Titanium to reduce weight over the original Shimanoversion. The Crank-O-Matic crank arm bolts are machined of Titanium 6Al-4V rod. The bolt has a 6mm hex fitting on its head, that passes through the aluminum crank arm cap. Between the crank arm cap and the crank bolt is a sintered bronze washer to reduce any direct friction. (The sintering process involves bronze dust, impregnated with oil, being put under great heat and pressure, to construct a materially solid washer that has a high self-lubricating quality, so adjoining surfaces slide smoothly).
