Shimano Ultegra FC-08 crankset is the successor to the R6800 and R8000 Ultegra cranksets, offering the same benefits as the R8000 model. It belongs to Shimano's new Ultegra R8000 series, incorporating many features from their Dura Ace series in a more affordable package. The crank arm on the R8000 crankset is made larger, providing significantly improved power transfer compared to previous versions. In addition to the technical upgrades for enhanced power transfer, the design has been revamped for a sleek and attractive appearance. Specifications and features: 52 teeth on the large chainring and 36 teeth on the small one. Crank arm length of 172.5mm.