lol ive been looking at the instructions for the mode converter and its abit odd.
it says for a cassette with 34t cog : x
for a close ratio set 26t: -
i will be using a close ratio so does this mean i need the mode converter on or off?
(edit) just found what i as looking for
so for anyone else who wants to know:
Possibly most important is a little feature Shimano just came up with is called a "mode converter." This is a little bracket that fits on the backside of the derailleur just below the pivot. It comes pre-installed. When it's in there, the derailleur is in AM mode. The derailleurs upper jockey wheel is held further away from the largest cogs of wide-ratio cassettes, like 11-32 and 11-34. By removing the mode converter, the derailleur is in DH mode. The upper jockey wheel can swing closer to the cassette cogs, making shifting faster when using 11-23, 12-25, and 11-28 cassettes.