Profile GDH Titanium Spindle Description: The Profile GDH Ti Spindle Upgrade Kit is made from 6AI-4V titanium alloy featuring a hollow center, 48 splines, and hollow chromoly bolts with aluminum washers. This kit saves 3.15 oz over the Chromoly upgrade kit, 1.85 oz over the solid Ti spindle with bitchin' bolts and 6.3 oz over the solid chromoly spindle with bitchin' bolts. Specifications: Splines: 48 Diameter: 19mm Length: 6" Type: Euro BB, Press fit BB (68 and 73mm) Weight: 5.77 oz (165g) Note: To prevent seizing during installation anti-seize is highly recommended. Place an ample amount on the threads and splines/flats before installation.