SRAM X0 Ebike Crank Arm Set - 170mm ISIS BlackSRAM X0 Ebike Crank Arm Set 170mm ISIS Black. The X0 Eagle E MTB crankset is all the durability you expect from X0 optimized for E MTB. The eye catching all aluminum design utilizes a perfectly balanced stiffness to weight ratio. The X0 Eagle E MTB Crankset and X0 Eagle Transmission (T Type) direct mount chainring delivers premier shifting performance reliable strength and optional bolt on guards to protect your ring in the roughest terrain. All