The JR-TRX401-GU is an aluminium crossmember developed for TRX-4 platforms and supplied in a gun metal finish. It replaces the factory centre crossmember to reduce unwanted flex while keeping the vehicle's scale aesthetics intact.
Aluminium construction and the chosen finish are intended to provide longevity and a coherent look with common scale builds, while preserving the stock mounting footprint and approximate weight. The component acts as a tuning aid, changing how suspension and tyres deliver traction across uneven sections.
Installation: the crossmember utilises the standard TRX-4 chassis mount arrangement and fastener pattern, so no special tools are required. Tighten fasteners evenly to avoid artificial preload on the rails.
Tuning guidance: installing a stiffer central crossmember will alter articulation and can produce crisper steering and steadier feedback for setup decisions. After fitting, make modest incremental adjustments to shock length or spring rates to regain the desired travel and traction balance.
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