The spec sheet for my bike said "Truvativ square drive cranks". The bike had Truvative Isis drive cranks (better cranks). The chainrings were supposed to be 42/52/62, The bike had one smaller than 42 (a 38 I think), a 52 and 62 tooth ring. I love the lower granny! It was a case where the manufacturer changed parts, and the changing of those parts were an upgrade and resulted in better performance for me.