Four-hole positioning triple crankset for bicycles

The utility model relates to a four-hole positioning triple crankset for bicycles. The four-hole positioning triple crankset for bicycles comprises a chain retaining board, a large chain ring, a medium chain ring, a small chain ring and a middle connecting board. The chain retaining board, the large chain ring, the medium chain ring and the small chain ring are coaxially fixed. The middle connecting board is fixed to the center of the small chain ring and is fixed to a crankshaft. The four-hole positioning triple crankset for bicycles is characterized in that upper chain positioning point pairs are arranged on two sides of the crankshaft on front sides of the large chain ring and the medium chain ring, each upper chain positioning point pair consists of two upper chain positioning projections made at the tooth root, the distance between the two upper chain positioning projections is equal to the length of four chain links, a group of lower chain short teeth are arranged at positions of the large chain ring an