I purchased a new spider and rings to upgrade my XO drive train from 24/36 to 26/39...I got the med fron Derrailuer that I was told I will need for the larger front ring, but once eveything was put on...It was great till I shifted in to the small front ring and was going thru the shifting cycle and BAM my chain came off when I was on the smaller cogs.....Did I do something wrong? I tried 2 different chain length and one will work but its tight as hell on the big ring combo but perfect on the small ring now......please help?
XO front 26/39 XX rear Derrailuer 11-36 is what I have on now
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