Shimano Ultegra chainset. 175mm cranks. Chainrings are 53 outer, 39 inner. Inner ring recently replaced, so essentially unworn. Outer ring has plenty of use left in it. Some pitting on axle but not on the bottom bracket contact surfaces, so no functional issue. Bottom bracket not included. This 10 speed model was issued by Shimano around 2009 - 2010.