Promax HF-2 2-Piece Crankset Crank Arm Length:177.5mm This alloy is designed to

This alloy is designed to be super tough and lightweight and if it is good enough for airplanes

BOLT REQUIREMENT: Built-in threads allow use of any chainring bolt

SIZING PROVIDED BY FLY RACING

AXLE: Inner 14mm hollow aluminum axle with 3/8" (24T) chromoly axle bolts

Promax HF-2 2-Piece Crankset Crank Arm Length:177.5mm This alloy is designed toPromax HF 2 Cranks. represents the best in Promaxs already illustrious line of cranks. Crafted from 6061 T6 aluminum, and featuring a 24mm chromoly spindle, the HF 2's are super stiff as they are lightweight and durable. Requires 4 bolt chainring. Bottom bracket sold separately. SPECIFICATIONS SPINDLE FIT: Designed as 2 pc crank, spindle included and built on to drive arm MATERIAL: 6061 T6 aluminum, Hollow forged arms with 24mm hollow chromoly spindle