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a technical question, lads. I have old(ish) MTB with 3x9 XT M772 groupset and I finally had it with front derailleur fiddling, so I want to convert it to 1x9.
I'm thinking of getting 1x crankset 40t 104BCD, 9sp 11-36 cassette (RD is with long cage), 9sp chain and a chain guide. am I missing something? will it work? do I have to change BB too?