Shimano Triathalon的齒片搭配

剛剛看到一段Shimano 三鐵大齒片搭配的敘述。雖然不知道是不是正確，但是先記錄一下....

Dura-Ace 9-Speed FC7700 Triathalon BCD 130mm Chainring. Rings are designed to be used only as a set
42/54, 42/55, or 44/56. 45t ring is an option to be used with the 56t
ring. Any other combinations may result in poor shifting.