Group shimano deore xt m8120 4 pistons, 175 mm, 32t, 10-45this group contains:im8120jrrxsa170 - shimano deore xt brake (kit) brm8120ktblm8100 right/rear resin with fin without adapter 1700 (black)ifcm81201exx - shimano deore xt crankset fcm81201set 12-speed 175,0 mm without chainring color seriesirdm8100gs - shimano deore xt rear derailleur rd-m8100-gs 12 speedim8120jlfxsa100 - shimano deore xt brake (kit) brm8120ktblm8100 left / front resin with fin without adapter 1000 (black)ismcrm85a2 - shimano deore xt chainring sm-crm85 12 speed 32tislm8100rap - shimano deore xt shifter slm8100rseticsm8100045 - shimano deore xt cassette cs-m8100-12 12 speed 10-12-14-16-18-21-24-28-32-36-40-45ticnm8100126q - shimano chain cn-m8100 hg 12 speed e-bike rated 126 quick-link linksCrankset chainrings: 32TCassette teeth: 10-45Crank length: 175 mm