Double chainset single chainset series ethirteen trs application enduro chain wheel teeth 3622 3824 crank lengths 170 175 180 mm bolt size 104 mm constructions bsa 1 37 x 24 eng pf30 bb92 bb30 housing widths 68 73 mm chain line 51 mm please note product can include various sizes product can include different versions crank arm material aluminium weight 721 g