This Shimano FC-1057 tandem crankset comes complete with the drive side crank (170mm) and both timing side cranks (170mm). I believe this crankset is original equipment for our circa 2004 Cannondale RT1000 road tandem. The chainrings are included but, the big and the middle chainrings are pretty worn. The cranksets do need to be polished to shine again. These were removed when our tandem was upgraded to a different crankset which was shorter in the back. Make an offer. Pictures show what is included.