Triple chainset series shimano acera application mtb chain wheel teeth 423222 crank length 170 mm bolt sizes 64 104 mm construction shimano octalink speeds 3x8 3x9 housing widths 68 73 mm axle length 122 5 please note product can include different versions crank arm material steel pedal thread 916 1428 x 127 mm colours silver black weight 1 002 g