Stronglight double crank set *Impact Compact* made of aluminium 6061, 5 arm, 110mm BCD, square taper JIS standard. Incl. chainrings type 110 S 5083 aluminium anodised, 9-speed and 10-speed compatible. With a bottom bracket with 107mm axle length, square taper JIS (not included) the crank set has a chain line of 43.5mm, colour: silver, available versions: crank arm length 170mm - 34/48 teeth, crank arm length 170mm - 34/50 teeth, crank arm length 175mm - 34/50 teeth, weight: approx. 675g.