Group shimano deore xt m8120 2 pistons, 175 mm, 36t, 10-45 i-spec evthis group contains:ifcm81201exx - shimano deore xt crankset fcm81201set 12 speeds 175,0 mm without chainring color seriesirdm8100gs - shimano deore xt rear derailleur rd-m8100-gs 12 speedicsm8100045 - shimano deore xt cassette cs-m8100-12 12 speed 10-12-14-16-18-21-24-28-32-36-40-45tim8100jlfpra100 - shimano deore xt brake (kit) brm8100jtblm8100 left / front resin without fin without adapter 1000 (black)im8100jrrxra170 - shimano deore xt brake (kit) brm8100jtblm8100 right / rear resin finless without adapter 1700 (black)ismcrm85a6 - shimano deore xt chainring sm-crm85 12-speed 36ticnm8100126q - shimano chain cn-m8100 hg 12-speed e-bike rated 126 quick-link linksislm8100irap - shimano deore xt shifter slm8100rsetCrankset teeth: 36TCassette teeth: 10-45Crank length: 175 mm