julio 25, 2026
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 SRAM's 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. Item HAVE A QUESTION?Expert customer service by bike experts! A Real Brick And Mortar Retail Bicycle Shop with people you can talk to! Contact Us! (9-5 Mon-Fri, 12-4 Sat & Sun EST) Chat With Us