Promax HF-3 Hollow Hot Forged Crankset - 170mm 2-PC Direct Mount SRAM 3-Bolt 30mm Spindle Black. HF-3 cranks are Promax’s top-of-the-line aluminum 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 30mm spindle permanently fitted into the drive-side arm. These cranks offer direct-mount sprocket compatibility for additional weight savings or run them with the included 104 BCD spider adapter.

CNC machined 6061-T6 aluminum crank arms are lightweight strong and stiff

Designed and optimized for chainrings and spiders with SRAMs 3-Bolt mount style

Includes 4-bolt 104 BCD spider/adapter (Not compatible with CK-1 crank spider/adapter)

30mm spindle provides increased stiffness and efficient power transfer

Pedal washers included and required

Bottom bracket sold separately