The new FC-R8100 crank of the ULTEGRA series offers the same fast, precise shifting performance at the front and the same efficient power transfer for which SHIMANO is known. In addition, it is now available in even more length options than before. With a length ranging from 160 to 175 mm, the ULTEGRA cranks are now also suitable for smaller riders, triathletes, and anyone interested in shorter crank arms.