Strong and stylish 7075-T6 aluminum cranks durable enough for MTB, Bikelife, Racing, and casual BMX. These use a proprietary spline-drive system that allows a wide range of chain-line adjustments without a need for "offset" sprockets (see details below). Includes full crankset, pre-load ring, bottom bracket spacers, sprocket, and your choice of steel or titanium spindle and bolts. Spindle is 24mm diameter. 

146mm BMX spindle - chainlines 41mm to 45mm
160mm MTB spindle - chainlines 49mm to 53mm

170mm crankset w/steel 160mm spindle and bolts = 912g
170mm crankset w/titanium 160mm spindle and bolts = 774g
34T Sprocket w/adapter =