Group shimano grx 600 11v mecha double, 172.5 mm, 46x30t, 11-34this group contains:efcrx600112dx60 - shimano grx crankset fc-rx600-11 11 speed 172,5 mm 46-30t color seriesifdrx810f - shimano grx front derailleurs fd-rx810-f double down swing braze-on color seriesicshg70011134 - shimano cassette cs-hg700-11 11 speeds 11-13-15-17-19-21-23-25-27-30-34tirx4001rrdsc170a - shimano grx brake (kit) brrx400ktstrx600st right/rear resin with fin without adapter, for 25 mm rear mounting thickness 1700 (black)irx4001dlf6sc100a - shimano grx brake (kit) brrx400ktstrx600st left / front resin with fin assembled front bracket for 160 mm disc 1000 (black)irdrx810 - shimano grx rear derailleur rdrx810set 11-speedicnhg70111116q - shimano chain cn-hg701-11 hg-x11 e-bike rated 116 quick-link linksCrankset teeth: 46x30TCassette teeth: 11-34Crank length: 172.5 mm