The Shimano Tiagra FC-4703 10 speed triple chainrings are the perfect replacement for worn or damaged chainrings
The chainring teeth have been developed to work only in conjunction with Shimano HG-X 10-speed chains for improved contact providing more efficiency and improved power transfer
Genuine Shimano replacement chainrings for the FC-4703 cranksets available in 50T (Outer ring), 39T (Middle ring) and 34T (Inner ring) 
Shimano part numbers: 50T-MM - Y1RD98030, matches 39T-MM - Y1RD98050, and 30T-MM - Y1RD30000
Compatible chain Shimano HG-X 10-speed