Shimano FC-7800 Dura Ace 2x10sp chainring, 130BCD - 53t (B)
Stock for Dura-Ace 7800/7803 double and triple cranksets. Nickel plated duraluminum: 10-speed SIS compatible. For best shifting performance, match A-type, B-type, or E-type chainrings. Features: Rings are designed to be used only as a set42/54, 42/55, or 44/56. 45t ring is an optionto be used with the 56t ring. Any other combinations may result inpoor shifting