Molded composite C-hub for steering block. Made from super-tough, high-tech composite material. Caster pre-set at 6. Roll center position can be quickly & easily adjusted by inserting different thickness shims atop the caster block, between the block and vertical ball stud. This C-hub is suitable for most track conditions, especially for medium- and high-traction tracks. Large openings allow for quick & easy CVD assembly/disassembly; the entire CVD assembly can be easily inserted/removed through the C-hub without the need for disassembly. The large openings also prevent jamming of the CVD within the C-hub during serious crashes.