Shimano XT M8200 Drivetrain 1X12 OEM. New Just not in original packaging. XT cassette 10-51, XT shifter (i-spec), XT Derailleur. and KMC 12 speed chain.RD-M8200 Mechanical Rear DerailleurLow-profile wedge design and internal spring for trail-impact absorption, with up to 510% range (51t).SL-M8200 ShifterTighter action, quicker release, and natural ergonomics in a redesigned package.FC-M8200 CranksetLightweight and rigid Hollowtech II crank arms optimized for enduro power and efficiency.CS-M8200 CassetteWide-range 12-speed cassette with smooth Hyperglide+ shifting under load.KMC 12 Speed Chain