Promax HF-2 Crankset – 180mm 24mm Spindle 2-Piece Black. HF-2 cranks are Promaxs 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.

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