This black alloy rear hub carrier is intended for HPI Bullet platforms and is listed under part number BUL-18009-BK. It is an aftermarket replacement component for the rear hub assembly on Bullet 3.0 chassis, offering alloy construction that differs in behaviour from the stock part.
Compatibility is documented for the BULLET 3.0 MT and BULLET 3.0 ST models. The carrier mounts to the rear suspension upright using the vehicle's standard attachment points and pairs with the common wheel hex and axle arrangement used on those chassis. Installation is completed with standard hobby tools.
As an upgrade, an alloy rear hub carrier can change suspension response, increase load resistance, and alter feel when adjusting geometry. After fitting, verify wheel alignment, check fastener torque, and make sure the wheel and axle assembly turns freely.