Shimano Ultegra FC-6800 50/34 Road Bike Crankset 172.5mm Posted July 19, 2024 Shimano Ultegra FC-6800 50/34 Road Bike Crankset 172.5mmShimano Ultegra FC-6800 50/34 Road Bike Crankset 172.5mm. If you have any questions, do not hesitate to ask. Please view my other items, thank you.