RaceFace Ride X-Type SS Crankset, 170mm, 32T/Bash, Black Crank arms are net forged from 6061 aluminum with aggressive styling for a high strength to weight ratio. All 2008 Race Face XC cranksets feature our new EXI interface external bottom bracket system for easier crank installation and removal with standard tools. Retains the same 3mm range chainline adjustment feature as our high end X-Type cranksets which aids in dialing in drive train performance. Features our lightweight, forged and CNC machined CrMo steel EXI spindle. BB cups are forged & CNC machined from high strength 6066 aluminum.