Take control of your day with the versatility and performance of Shimano ULTEGRA R8100 Crankset 2x12s Road Bicycle 165mm 170mm 172.5mm 50-34T 52-36T Hollow Integrated Speed Crank For Road Bike. Smart, efficient, and built to last — an essential in any collection. Browse and buy online at Keser.pl — trusted products at great prices.