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My XTR M980 trail crank set has 38/26 chain rings. If I bump up to a 40 tooth big ring, can my XTR M985-E2 FD shift up and down between the 26 and 40 tooth rings? Would I be experiencing chain drop issues? Thanks!
 

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I do not know about your specific FD, but on my Rumblefish, with the original SLX FD, I run a 22-36 combo with no issues. I also run a XT Shadow + RD, so I don't know if the clutch is part of the reason why I am not dropping chains or not.
 
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