Race face chester crank armsat half a pound lighter than the race face ride dh crank and just as stiff as atlas chester is the go to for your am dj dh or fr rig extensive engineering and finite element analysis have been employed to maximize strength from this net forged 6066 alloy crank while keeping weight as low as possible the patented i lock crmo steel inserts give this crank dh strength at the critical pedal interface the middle weight am bb spindles are stronger than some of race face