RaceFace Atlas FR Mountain Bike Crankset A true FR/DH race crank  light enough for fast pedaling & strong enough for descents. CNC machined in our British Columbia, Canada manufacturing facility Manufactured from OPTIM-AL, over 20% stronger compared to the commonly used 7050 alloy. Un-matched strength to weight ratio compared to other manufacturers FR/DH cranks. Thick walled, heat treated CroMo spindle.