1984
Shimano Dura-Ace 7400
The 8-speed 7400 introduced indexed shifting to professional road cycling. SIS (Shimano Indexed Shifting) allowed precise, click-stop gear changes that professionals had previously rejected — 1984's Shimano-equipped Tour de France team proved its race worthiness instantly.
Road Groupset
Technical Specifications
| Material | Aluminum |
| Weight | 2,390 g |
| Cassette Range | 13-23T |