This is a set of optional ST Racing Concepts 0.5° Aluminum Rear Hub Carriers, and are intended for use with the Traxxas Slash 4x4, as well as the Nitro Slash. These rear hub carriers are CNC Machined from high-grade aluminum, and feature an additional 0.5° of rear toe in per side for improved rear traction, and a set-screw over hinge-pin design to secure the hub carriers on the hinge-pins. This design prevents pre-mature wear by forcing the hinge-pins to rotate in the suspension arms instead of the aluminum hub carriers. They are machined with a process that drills the bearing holes after anodizing, providing the tightest tolerance possible around the bearing area. These parts increase durability, while at the same time adding an awesome factory look to your Slash 4x4.
Note: The set screw in the rear hub is intended for use ST3640RS and ST3640RBK lock-nut style rear outer hinge-pins only. Set screws are not used in the hubs with kit type hinge-pins.