Rear shock towers are redesigned to accommodate the Horizontal Split Bulkheads (HS), and feature denser upper shock mount positions for more precise set-up adjustments. The rear shock tower features extra roll center positions for even more fine set-up adjustment as well extra wing mounting positions. Rear shock towers are machined from premium-grade 3.5 mm graphite and are lightweight & strong, with multiple shock positions and roll center adjustment positions Fits XB4'21
