I’m in the process of switching from an 11-25 to 11-32 rear cassette. The upgrade has involved replacing the cassette, rear derailleur (short to medium cage) and fitting a new chain.
I can cleanly shift through all rear gears on the small front cog, however on the large cog I’m unable to shift to the lowest few gears. Towards these lowest gears the rear derailleur looks to be under a lot of tension, the upper jockey wheel is not engaged and things get jammed up:
I believe I’ve sized the chain too short but I’m looking for confirmation as I thought I used the largest front/rear without derailleur + 2 links when sizing.
If I have sized things incorrectly can I just pick up a few more link pins and add some links back? Anybody able to offer suggestions on how many additional links to add?