The Composite C-hubs with 6° caster were especially developed for the GT on-road platform. After substantial tests of varied caster angles, the final 6° caster had been chosen since the best option to function in number of racing conditions available at GT activities. The C-hub geometry notably improves steering traits throughout the previous 16° hubs. The paid down caster angle also really helps to reduce tire wear, creating more constant management during longer main activities. Utilize with #352279 C-hub 6° Appropriate. Fits both GTX and GTXE.