I am running a 9 speed setup. I recently installed a new chain, and it is about 1 chain link shorter than my old. I have my front derailleur tuned perfect, and my rear derailleur is tuned good, except that it ghost shifts under load when I am pushing middle ring up front and fifth cog in the back. It's bad enough that it's immpossible to sprint from that gear combo. It also happens in middle 4, but only under really hevy load. Also in middle ring up front, I find that pushing to harder gears in the back is slightly erratic.
So is this a tuning problem, or should I lengthen my chain? Wrapping the chain around the big cog in back and big ring in front, sram recommend that it's 2 extra links bigger, including the powerlink chain, but I recently measured my new chain, and it is 1 link shorter than it should be. This shouldn't matter too much, should it?
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Thread: Ghost shifting