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Made for use with the Saint FC-M815 double crankset, the Shimano Shimano Saint FD-M815 Front Derailleur comes in two versions: top or bottom swing. This top swing option will keep your chain shifting smoothly and quickly. This derailleur accommodates the 57.5mm chainline that comes part and parcel with your 83mm bottom bracket. The dual-pull design means you can mount your cables to pull from above or below, and shims are included so you can clamp this sucker to 28.6, 31.8, or 34.9mm tubes. This derailleur jives with chain stay angles of 65-71 degrees, and chain ring ratios of 36/22T.

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My shimano Deore M510 front derailleur was...

My shimano Deore M510 front derailleur was smashed up this weekend and I'm wondering if I can switch it out for the saint derailleur with out switching my shifters. I have an 06 Specialized FSR XC with 3 rings on the front.