Wrap-Up Next GX Kingpin Angle Extension - PurpleWrap Up Next (#0757 FD) GX Kingpin Angle Extension Purple Feature: For: Wrap Up Next GX Knuckle This extension increased the choice and range of kingpin angle of the original GX steering knuckle. Since there is many choice in wheel offset and wheel hub size you can increase you choice by combining these. By adjusting the kingpin angle, you are able to bring your steering center close to the center of the tyre. And you can still adjust the scrub