Ideal for hilly road use or cyclocross the Gossamer Pro chainset uses FSA's proven integrated MegaExo BB which uses oversized cartridge bearings and a 24mm integrated CroMo spindle, finished off with Anodized alloy external bearing cups. Cold forged aluminium crank arms a monocoque crankarm/spider and precision CNC machined 7075/T6 chainrings which are ramped and pinned for perfect shifting with Campag, SRAM or Shimano drivetrains.