The number of parts in the new Shimano Ultegra 6600 series cranks are reduced, weight is reduced and efficiency has been radically increased. In addition, Hollowtech II Shimano Ultegra 6600 allows the bottom bracket bearings to be spaced wider apart (outboard bearings) and the axle and bearings themselves to be larger. The net result of course is a more effective load distribution, increased rigidity and stability, as well as longer service life. What does this all mean? It means the Shimano Ultegra 6600 cranks will make you ultimatly have more fun on your bike
CUP SET IS NOT INCLUDED, MUST BE PURCHASED SEPARATELY. k
