The GPM BMT056 is a precision-machined alloy rear suspension arm designed for HPI Bullet 3.0 MT and ST platforms. As a direct replacement, it preserves factory geometry while providing a higher stiffness alternative to injection-moulded plastic arms for nitro short-course applications.
This technical overview covers fitment, installation checks, and the component's impact on suspension tuning. The alloy construction improves repeatable geometry under load, reduces deflection in high-speed cornering, and offers enhanced durability for frequent competitive or club use.
During installation follow workshop best practice: verify ball stud integrity, confirm pivot pin tolerances, torque mounting hardware to spec, and validate toe and camber settings after final assembly to ensure predictable dynamic behaviour.