Fsa energy mexo n 1011 cranksetenergy is fsas most advanced aluminium crankset cutting edge manufacturing techniques allow fsa to cold forge hollow aluminium arms cutting weight without any sacrifice in stiffness the spindle is aluminium too forged from ultra strong 7075 theres more 7075 in the cnc machined chainrings even the chainring bolts are 7075 the result is a high performance crankset with a weight of just 757g a mix of polished and sandblasted black anodising complemented b