Shimano Dura-Ace FC-7800 Crankset

"Borrowed from Shimano?s new mountain bike technology, the Dura-ace 2-piece crankset combines the bottom bracket and crank arm into one creating a stiffer, stronger and lighter crankset. This provides you with better power transfer, which makes for more speed and acceleration. The outboard bearing design provides more stability, while maintaining an easy installation, adjustability and maintenance."