Profile No Boss Racing BMX Cranksets. Compatible only with Spline Drive chainwheels/spiders. Features: Arms, spindle, all bolts, crank tool and anti-seize included Works only with Spline Drive chainwheels/spiders Race cranks have standard arms and standard 3/4" (19mm) BB spindle Tubular chromoly arms Bottom bracket not included Crank arm fixing bolts are flush mount for both Chromoly and Ti Specs: Crankset Style 3-Piece Defined Color Black Color Black BB Included No Weight (oz) 27.7 Drive Side Compatibility Right Hand Drive Crank Arm Material Steel Bore 19 Crank Length (mm) 170 Spindle Material Steel Spindle Length 5.25