The Race Face Atlas Crank is the most overbuilt that the company produces. It can handle anything and everything, but it is designed to be used and abused until it is ground to dust sometime in the next millennium. It starts with the 30mm aluminum alloy spindle and Cinch mounting platform that you ll find across their line. It then adds on two machined aluminum crankarms that are brutally strong. It s not only the pedaling and g forces they can withstand, but the grinding, slamming crashes that are part and parcel of riding out too far on the edge. The crank comes with two arms, spider, pre-load adjuster and lock ring. You need to source the bottom bracket and either direct mount chain ring or 104/64mm or 120/80mm spider (available in both standard and Boost spacing). It also can be setup for BMX with a BMX spindle and 104mm spider. If you want to go with super Boost or wider bottom brackets, wider spindles are available. So, too, is a Cinch power meter spider. Crank lengths are 165, 170, and 175mm.