HF-2 cranks are Promax’s top-of-the-line crank offering. Hollow-forged from 6061-T6 aluminum, both crank arms are hollow so they are super stiff, yet lightweight. The crank arms spin on a beefy 24-millimeter spindle permanently fitted into the drive-side arm.Features-104mm BCD-Laser-etched graphics-Bottom bracket sold separately-Pedal washers included-Chainline: 43-Q-Factor: 167-Will not fit English x 73mm bottom bracket shellsItem Specifications-Color:Black-Crankset Style:2-Piece-Crank Length (mm):180-Crank Intended Use:BMX-Weight:877-Drive Side Compatibility:Right Hand Drive-Pedal Spindle:9/16"-BB Included:No-Weight (oz):30.93-Crank Arm Material:Aluminum-Chainring BCD:104-Chainrings Included:No-Spindle Material:Steel-Defined Color:Black-Bore:24