The JR-TT2B05-GU set offers machined gun-metal aluminium rear suspension arms as a direct aftermarket option for the Tamiya TT-02B chassis. Replacing the standard plastic arms with alloy parts gives a firmer mounting point that helps with setup repeatability and handling refinement.
These arms serve as the rear link components and will affect roll centre and rear track stability, altering how the rear end responds to damping and spring rate adjustments. They are suited to drivers tuning rear geometry or seeking a more durable replacement for frequent running.
Installation guidance: verify correct orientation and hole positions before final torqueing, reuse original pins and retainers when appropriate, and check that the suspension moves freely through its travel to avoid binding. Routine inspections of fasteners and contact surfaces help preserve alignment.