Fsa sl k bb386 n 11 cranksetsl k light bb386evo road crankset features hollow carbon fibre arms for amazing stiffness and low weight the adaptable bb386evo 30mm spindle will fit a wide variety of frames with a range of bb standards the sl k light uses fsas asymmetric bolt standard with four bolts at 90 degrees to one another and a fifth behind the crank arm adding support where its needed the unidirectional carbon finish updated graphics and concealed chainring bolts make the sl k light