Microshift recently announced/released an updated shifter and wider range cassette to be used with original Advent 9-speed derailleur. It has an 11-46 cassette, which is a 4 tooth increase on the bailout gear.
I had been considering jumping to the Advent-X 10 speed set up with its 11-48 cassette but this will allow me to keep my derailleur (the most expensive piece of the puzzle).
I don’t love the steps in the Microshift cassette but I do like the Box 11-46 9-speed cassette. But I really really like the Box 11-50 cassette.
Has anyone used the Advent 9-speed derailleur with a 50T bail out gear?