The GPM RR237SAN steel adjustable main shaft for the AXIAL RR10 Bomber is precision engineered from aluminum 6061 T6 and hardened steel #45 to provide a strong, lightweight replacement. The universal swing shaft cross head enhances steering articulation for steep or technical crawls, while the supplied white silicone O-ring reduces wear at contact points. Length adjustability covers front 116-126mm and rear 147-157mm, allowing tuners to match common drivetrain layouts.