The Profile GDH-SD cranks are made in the USA by Profile racing. The GDH-SD cranks feature bossless chromoly arms that are designed to work with spline drive chain wheels only. A 48-spline hollow chromoly spindle and hollow flush mount spindle bolts complete the kit.
Guide for 19mm axle lenghts:
-5.625"(for Mid,American,Spanish,and internal Euro BB's)