This graphite radio tray is an aftermarket upgrade for HPI Bullet 3.0 MT and ST nitro chassis. It provides a low-profile, stiff platform for receiver, servo and small electronics while supporting organised cable routing. The sections below detail compatibility, fitting guidance and tuning considerations for hobbyists.
Compatibility and role: the tray is intended to replace the standard radio platform on Bullet 3.0 MT and ST nitro chassis to deliver improved mounting rigidity and a tidy electronics bay. The firmer surface reduces movement of the receiver and servo connectors during heavy use, aiding consistent steering input and radio performance.
Installation notes: the tray aligns with the original mounting points so installation normally uses existing screw locations and hardware. Inspect screw length and thread before final fitting, route antenna and servo leads to avoid sharp bends or pinching, and confirm there is no interference with fuel tank or exhaust routing on nitro setups.
Tuning considerations: fitting a graphite tray alters local chassis stiffness and can change feedback through the steering. After fitting, prioritise verifying radio and servo stability, then adjust suspension or ballast if handling characteristics require tuning.