Fit the following, all new drivetrain components to my Pinarelo that has Ultegra shifters:
- Tiagra 11t-34t cassette
- long cage derailleur
- derailleur hanger
If I set it up such that the top gears work, the bottom 2 gears won't engage. And the other way around: if I set up the derailleur for the bottom gear, the top 2 won't engage.
Scratching my head as to what might be causing this.