The new FC-R8100 crank in the Ultegra range offers the same fast, precise front shifting performance and efficient power transmission for which Shimano is renowned. In addition, it is available in even more length variants than before. With lengths between 160 and 175 mm, Ultegra cranks are now also suitable for shorter riders, triathletes and anyone interested in shorter crank arms. Lightweight cranks reduce the overall weight of the bike and, above all, the rotating mass that is crucial for acceleration. The challenge is to reduce the weight of the crank without compromising stability and resilience. Shimano's state-of-the-art forging technology offers an ideal solution with the Hollowtech crank. Just like a high-quality frame tube, the hollow-arm crank is extremely stable and resilient at a very low weight.