For sale is a Shimano FC-R553 Crankset, this is the triple chain rings that come with the 50/39/30 sizes. This crank is equivalent to the entry level Shimano 105 of that era. This came off a 2011 Trek Madone 4.5 full carbon bike. There is obvious signs of use to the crankset like minor rock chips to the crank arms as well as some wear to the chainrings, otherwise this works perfectly as intended and would make a great replacement crank or back-up. Thanks for looking.