The Composite C-hubs with 6° caster had been particularly developed the GT on-road platform. After substantial tests of numerous caster angles, the last 6°caster had been chosen as the best choice to get results in the wide range of racing conditions found at GT events. The C-hub geometry considerably improves steering faculties over the previous 16° hubs. The reduced caster angle additionally helps to reduce tire wear, creating more constant maneuvering during longer main activities. Use with #352289 C-hub 6° Left. Fits both GTX and GTXE.