K force light abs bb386evo road crankset features hollow carbon fiber arms for amazing stiffness and low weight the adaptable bb386 evo 30mm spindle will fit a wide variety of frames with a range of bb standards the k force light abs bb386 evo uses fsas asymmetric bolt standard with four bolts at 90 degrees to one another and a fifth behind the crankarm adding support where its needed choose from the traditional 5339 chainring combination 5034 compact or 5236 semi compact the unidire